打印矩形图案的程序-yiteyi-C++库

给定高度h和宽度w，打印一个矩形图案，如下例所示。

null

例如：

Input : h = 4, w = 5
Output : @@@@@
         @   @
         @   @
         @@@@@

Input : h = 7, w = 9
Output : @@@@@@@@
         @      @
         @      @
         @      @
         @      @
         @      @
         @@@@@@@@

推荐：请尝试你的方法 {IDE} 首先，在进入解决方案之前。

这个想法是运行两个循环。一个用于打印行数，另一个用于列数。仅当当前行是第一行或最后一行时才打印“@”。或当前列是第一列或最后一列。

C++

                         // CPP program to print a rectangular pattern                       
                         #include<iostream>                       
                         using                                     namespace                                     std;                       
                                   
                         void                                     printRectangle(                                     int                                     h,                                     int                                     w)                       
                         {                       
                                                 for                                     (                                     int                                     i=0; i<h; i++)                       
                                                 {                       
                                                 cout <<                                     ""                                     ;                       
                                                 for                                     (                                     int                                     j=0; j<w; j++)                       
                                                 {                       
                                                 // Print @ if this is first row                       
                                                 // or last row. Or this column                       
                                                 // is first or last.                       
                                                 if                                     (i == 0 || i == h-1 ||                       
                                                 j== 0 || j == w-1)                       
                                                 cout <<                                     "@"                                     ;                       
                                                 else                       
                                                 cout <<                                     " "                                     ;                       
                                                 }                       
                                                 }                       
                         }                       
                                   
                         // Driver code                       
                         int                                     main()                       
                         {                       
                                                 int                                     h = 4, w = 5;                       
                                                 printRectangle(h, w);                       
                                                 return                                     0;                       
                         }                       

JAVA

                         // JAVA program to print a rectangular                       
                         // pattern                       
                                   
                         class                                     GFG {                       
                                   
                                                 static                                     void                                     printRectangle(                                     int                                     h,                                     int                                     w)                       
                                                 {                       
                                                 for                                     (                                     int                                     i =                                     0                                     ; i < h; i++)                       
                                                 {                       
                                                 System.out.println();                       
                                                 for                                     (                                     int                                     j =                                     0                                     ; j < w; j++)                       
                                                 {                       
                                                 // Print @ if this is first                       
                                                 // row or last row. Or this                       
                                                 // column is first or last.                       
                                                 if                                     (i ==                                     0                                     || i == h-                                     1                                     ||                       
                                                 j==                                     0                                     || j == w-                                     1                                     )                       
                                                 System.out.print(                                     "@"                                     );                       
                                                 else                       
                                                 System.out.print(                                     " "                                     );                       
                                                 }                       
                                                 }                       
                                                 }                       
                                   
                                                 // Driver code                       
                                                 public                                     static                                     void                                     main(String args[])                       
                                                 {                       
                                                 int                                     h =                                     4                                     , w =                                     5                                     ;                       
                                                 printRectangle(h, w) ;                       
                                                 }                       
                         }                       
                                   
                         /*This code is contributed by Nikita Tiwari.*/                       

Python3

                         # Python 3 program to print a rectangular                       
                         # pattern                       
                                   
                         def                                     printRectangle(h, w) :                       
                                                 for                                     i                                     in                                     range                                     (                                     0                                     , h) :                       
                                                 print                                     ("")                       
                                                 for                                     j                                     in                                     range                                     (                                     0                                     , w) :                       
                                                 # Print @ if this is first row                       
                                                 # or last row. Or this column                       
                                                 # is first or last.                       
                                                 if                                     (i                                     =                                     =                                     0                                     or                                     i                                     =                                     =                                     h                                     -                                     1                                     or                                     j                                     =                                     =                                     0                                     or                                     j                                     =                                     =                                     w                                     -                                     1                                     ) :                       
                                                 print                                     (                                     "@"                                     ,end                                     =                                     "")                       
                                                 else                                     :                       
                                                 print                                     (                                     " "                                     ,end                                     =                                     "")                       
                                   
                                   
                         # Driver code                       
                         h                                     =                                     4                       
                         w                                     =                                     5                       
                         printRectangle(h, w)                       
                                   
                         # This code is contributed by Nikita Tiwari.                       

C#

                         // C# program to print a rectangular                       
                         // pattern                       
                         using System;                       
                         class GFG {                       
                                   
                                                 static void printRectangle(int h, int w)                       
                                                 {                       
                                                 for (int i = 0; i < h; i++)                       
                                                 {                       
                                                 Console.WriteLine();                       
                                                 for (int j = 0; j < w; j++)                       
                                                 {                       
                                                 // Print @ if this is first                       
                                                 // row or last row. Or this                       
                                                 // column is first or last.                       
                                                 if (i == 0 || i == h-1 ||                       
                                                 j== 0 || j == w-1)                       
                                                 Console.Write("@");                       
                                                 else                       
                                                 Console.Write(" ");                       
                                                 }                       
                                                 }                       
                                                 }                       
                                   
                                                 // Driver code                       
                                                 public static void Main()                       
                                                 {                       
                                                 int h = 4, w = 5;                       
                                                 printRectangle(h, w) ;                       
                                                 }                       
                         }                       
                                   
                         /*This code is contributed by vt_m.*/                       

PHP

                         <?php                       
                         // php program to print                       
                         // a rectangular pattern                       
                                   
                         function                                     printRectangle(                                     $h                                     ,                                     $w                                     )                       
                         {                       
                                                 for                                     (                                     $i                                     = 0;                                     $i                                     <                                     $h                                     ;                                     $i                                     ++)                       
                                                 {                       
                                                 echo                                     ""                                     ;                       
                                                 for                                     (                                     $j                                     = 0;                                     $j                                     <                                     $w                                     ;                                     $j                                     ++)                       
                                                 {                       
                                   
                                                 // Print @ if this is first row                       
                                                 // or last row. Or this column                       
                                                 // is first or last.                       
                                                 if                                     (                                     $i                                     == 0 ||                                     $i                                     ==                                     $h                                     - 1 ||                       
                                                 $j                                     == 0 ||                                     $j                                     ==                                     $w                                     - 1)                       
                                                 echo                                     "@"                                     ;                       
                                                 else                       
                                                 echo                                     " "                                     ;                       
                                                 }                       
                                                 }                       
                         }                       
                                   
                                                 // Driver code                       
                                                 $h                                     = 4;                       
                                                 $w                                     = 5;                       
                                                 printRectangle(                                     $h                                     ,                                     $w                                     );                       
                                   
                         // This code is contributed by mits                       
                         ?>                       

   
@@@@@
@   @
@   @
@@@@@

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