在正方形内打印正方形的程序-yiteyi-C++库

给定一个数字N，打印一个带有N个星号（’*’）的空心正方形，并在其内部打印一个带有N-4个星号（’*’）的空心正方形。 例如：

null

Input : 6Output :*******    ** ** ** ** **    *******Input :9Output :**********       ** ***** ** *   * ** *   * ** *   * ** ***** **       **********

推荐：请尝试你的方法 {IDE} 首先，在进入解决方案之前。

其思想是对行和列运行两个从1到n的嵌套循环，现在检查何时打印星号（“*”）以及何时打印空格（“”）。打印星号的条件为：

// This will print asterisks on the boundary(i == 1 || i == n || j == 1 || j == n)// This will print the asterisks on the boundary// of inner square(i >= 3 && i = 3 && j <= n - 2) &&(i == 3 || i == n - 2 || j == 3 || j == n - 2))

所有不满足上述条件的索引都将包含空格。以下是上述理念的实施：

C++

                         // C++ program to print square inside                       
                         // a square pattern                       
                         #include <iostream>                       
                         using                                     namespace                                     std;                       
           
           
                         // Function to print the pattern square                       
                         // inside a square                       
                         void                                     printPattern(                                     int                                     n)                       
                         {                       
                                                 int                                     i, j;                       
                                   
                                                 // To access rows of the square                       
                                                 for                                     (i = 1; i <= n; i++)                       
                                                 {                       
                                                 // To access columns of the square                       
                                                 for                                     (j = 1; j <= n; j++)                       
                                                 {                       
                                   
                                                 // For printing the required square pattern                       
                                                 if                                     ((i == 1 || i == n || j == 1 || j == n) ||                       
                                                 (i >= 3 && i <= n - 2 && j >= 3 && j <= n - 2) &&                       
                                                 (i == 3 || i == n - 2 || j == 3 || j == n - 2))                       
                                                 {                       
                                                 // Prints star(*)                       
                                                 cout<<                                     "*"                                     ;                       
                                                 }                       
                                                 else                       
                                                 {                       
                                                 // Prints space(" ")                       
                                                 cout<<                                     " "                                     ;                       
                                                 }                       
                                                 }                       
                                   
                                                 cout<<endl;                       
                                                 }                       
                         }                       
           
                         // Driver Code                       
                         int                                     main()                       
                         {                       
                                                 int                                     n = 7;                       
                                                 printPattern(n);                       
                                                 return                                     0;                       
                         }                       
           
                         // This code is contributed by Shivam.Pradhan.                       

C

                         // C program to print square inside                       
                         // a square pattern                       
                         #include <stdio.h>                       
           
                         // Function to print the pattern square                       
                         // inside a square                       
                         void                                     printPattern(                                     int                                     n)                       
                         {                       
                                                 int                                     i, j;                       
                                   
                                                 // To access rows of the square                       
                                                 for                                     (i = 1; i <= n; i++)                       
                                                 {                       
                                                 // To access columns of the square                       
                                                 for                                     (j = 1; j <= n; j++)                       
                                                 {                       
                                   
                                                 // For printing the required square pattern                       
                                                 if                                     ((i == 1 || i == n || j == 1 || j == n) ||                       
                                                 (i >= 3 && i <= n - 2 && j >= 3 && j <= n - 2) &&                       
                                                 (i == 3 || i == n - 2 || j == 3 || j == n - 2))                       
                                                 {                       
                                                 // Prints star(*)                       
                                                 printf                                     (                                     "*"                                     );                       
                                                 }                       
                                                 else                       
                                                 {                       
                                                 // Prints space(" ")                       
                                                 printf                                     (                                     " "                                     );                       
                                                 }                       
                                                 }                       
                                   
                                                 printf                                     (                                     ""                                     );                       
                                                 }                       
                         }                       
           
                         // Driver Code                       
                         int                                     main()                       
                         {                       
                                                 int                                     n = 7;                       
                                                 printPattern(n);                       
                                                 return                                     0;                       
                         }                       

JAVA

                         // Java program to print square inside                       
                         // a square pattern                       
                         import                                     java.lang.*;                       
           
                         class                                     GFG {                       
                                   
                         // Function to print the pattern square                       
                         // inside a square                       
                         static                                     void                                     printPattern(                                     int                                     n) {                       
           
                                                 // To access rows of the square                       
                                                 for                                     (                                     int                                     i =                                     1                                     ; i <= n; i++) {                       
                                   
                                                 // To access columns of the square                       
                                                 for                                     (                                     int                                     j =                                     1                                     ; j <= n; j++) {                       
           
                                                 /*** For printing the required square pattern ***/                       
                                                 if                                     ((i ==                                     1                                     || i == n || j ==                                     1                                     || j == n) ||                       
                                                 (i >=                                     3                                     && i <= n -                                     2                                     && j >=                                     3                                     && j <= n -                                     2                                     ) &&                       
                                                 (i ==                                     3                                     || i == n -                                     2                                     || j ==                                     3                                     || j == n -                                     2                                     ))                       
                                                 {                       
                                                 // Prints star(*)                       
                                                 System.out.print(                                     "*"                                     );                       
                                                 }                       
                                                 else                       
                                                 {                       
                                                 // Prints space(" ")                       
                                                 System.out.print(                                     " "                                     );                       
                                                 }                       
                                                 }                       
           
                                                 System.out.print(                                     ""                                     );                       
                                                 }                       
                         }                       
           
                         // Driver code                       
                         public                                     static                                     void                                     main(String[] args) {                       
                                                 int                                     n =                                     7                                     ;                       
                                                 printPattern(n);                       
                         }                       
                         }                       
           
                         // This code is contributed by Anant Agarwal.                       

Python3

                         # Python program to                       
                         # print square inside                       
                         # a square pattern                       
           
                         # Function to print                       
                         # the pattern square                       
                         # inside a square                       
                         def                                     printPattern(n):                       
                                   
                                                 # To access rows of the square                       
                                                 for                                     i                                     in                                     range                                     (                                     1                                     ,n                                     +                                     1                                     ):                       
                                   
                                                 # To access columns of the square                       
                                                 for                                     j                                     in                                     range                                     (                                     1                                     ,n                                     +                                     1                                     ):                       
                                   
                                                 # For printing the required square pattern                       
                                                 if                                     ((i                                     =                                     =                                     1                                     or                                     i                                     =                                     =                                     n                                     or                                     j                                     =                                     =                                     1                                     or                                     j                                     =                                     =                                     n)                                     or                       
                                                 (i >                                     =                                     3                                     and                                     i <                                     =                                     n                                     -                                     2                                     and                                     j >                                     =                                     3                                     and                                     j <                                     =                                     n                                     -                                     2                                     )                                     and                       
                                                 (i                                     =                                     =                                     3                                     or                                     i                                     =                                     =                                     n                                     -                                     2                                     or                                     j                                     =                                     =                                     3                                     or                                     j                                     =                                     =                                     n                                     -                                     2                                     )):                       
                                   
                                                 print                                     (                                     "*"                                     ,end                                     =                                     "")                                     # Prints star(*)                       
                                   
                                                 else                                     :                       
                                   
                                                 print                                     (                                     " "                                     ,end                                     =                                     "                                     ") # Prints space("                                     ")                       
                                   
                                                 print                                     ()                       
                                   
           
                         # Driver code                       
           
                         n                                     =                                     7                       
                         printPattern(n)                       
           
                         # This code is contributed                       
                         # by Anant Agarwal.                       

C#

                         // C# program to print square inside                       
                         // a square pattern                       
                         using                                     System;                       
           
                         class                                     GFG {                       
                                   
                                                 // Function to print the pattern square                       
                                                 // inside a square                       
                                                 static                                     void                                     printPattern(                                     int                                     n) {                       
                                   
                                                 // To access rows of the square                       
                                                 for                                     (                                     int                                     i = 1; i <= n; i++) {                       
                                   
                                                 // To access columns of the square                       
                                                 for                                     (                                     int                                     j = 1; j <= n; j++) {                       
                                   
                                                 /*** For printing the required                       
                                                 square pattern ***/                       
                                                 if                                     ((i == 1 || i == n || j == 1                       
                                                 || j == n) || (i >= 3 &&                       
                                                 i <= n - 2 && j >= 3 &&                       
                                                 j <= n - 2) && (i == 3 ||                       
                                                 i == n - 2 || j == 3 ||                       
                                                 j == n - 2))                       
                                                 {                       
                                   
                                                 // Prints star(*)                       
                                                 Console.Write(                                     "*"                                     );                       
                                                 }                       
                                                 else                       
                                                 {                       
                                   
                                                 // Prints space(" ")                       
                                                 Console.Write(                                     " "                                     );                       
                                                 }                       
                                                 }                       
                                   
                                                 Console.WriteLine();                       
                                                 }                       
                                                 }                       
                                   
                                                 // Driver code                       
                                                 public                                     static                                     void                                     Main() {                       
                                   
                                                 int                                     n = 7;                       
                                   
                                                 printPattern(n);                       
                                                 }                       
                         }                       
           
                         // This code is contributed by vt_m.                       

PHP

                         <?php                       
                         // PHP program to print square inside                       
                         // a square pattern                       
           
                         // Function to print the pattern square                       
                         // inside a square                       
                         function                                     printPattern(                                     $n                                     )                       
                         {                       
                                                 // To access rows of the square                       
                                                 for                                     (                                     $i                                     = 1;                                     $i                                     <=                                     $n                                     ;                                     $i                                     ++)                       
                                                 {                       
                                                 // To access columns of the square                       
                                                 for                                     (                                     $j                                     = 1;                                     $j                                     <=                                     $n                                     ;                                     $j                                     ++)                       
                                                 {                       
                                   
                                                 // For printing the required                       
                                                 // square pattern                       
                                                 if                                     ((                                     $i                                     == 1 ||                                     $i                                     ==                                     $n                                     ||                       
                                                 $j                                     == 1 ||                                     $j                                     ==                                     $n                                     ) ||                       
                                                 (                                     $i                                     >= 3 &&                                     $i                                     <=                                     $n                                     - 2 &&                       
                                                 $j                                     >= 3 &&                                     $j                                     <=                                     $n                                     - 2) &&                       
                                                 (                                     $i                                     == 3 ||                                     $i                                     ==                                     $n                                     - 2 ||                       
                                                 $j                                     == 3 ||                                     $j                                     ==                                     $n                                     - 2))                       
                                                 {                       
                                                 // Prints star(*)                       
                                                 echo                                     "*"                                     ;                       
                                                 }                       
                                                 else                       
                                                 {                       
                                                 // Prints space " "                       
                                                 echo                                     " "                                     ;                       
                                                 }                       
                                                 }                       
                                   
                                                 echo                                     ""                                     ;                       
                                                 }                       
                         }                       
           
                         // Driver Code                       
                         $n                                     = 7;                       
                         printPattern(                                     $n                                     );                       
           
                         // This code is contributed by Mithun Kumar                       
                         ?>                       

输出：

********     ** *** ** * * ** *** **     ********

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