矩阵中行和列的和-yiteyi-C++库

给定一个奇数维的整数矩阵（3*3，5*5）。然后，任务是找到中间行和列元素的总和。例如：

null

Input :  2 5 7         3 7 2         5 6 9Output : Sum of middle row = 12         Sum of middle column = 18Input :  1 3 5 6 7         3 5 3 2 1         1 2 3 4 5         7 9 2 1 6         9 1 5 3 2Output : Sum of middle row = 15         Sum of middle column = 18

推荐：请尝试你的方法 {IDE} 首先，在进入解决方案之前。

CPP

                         // C++ program to find sum of                       
                         // middle row and column in matrix                       
                         #include <iostream>                       
                         using                                     namespace                                     std;                       
                         const                                     int                                     MAX = 100;                       
           
                         void                                     middlesum(                                     int                                     mat[][MAX],                                     int                                     n)                       
                         {                       
           
                                                 int                                     row_sum = 0, col_sum = 0;                       
                                   
                                                 //loop for sum of row                       
                                                 for                                     (                                     int                                     i = 0; i < n; i++)                       
                                                 row_sum += mat[n / 2][i];                       
                                   
                                                 cout <<                                     "Sum of middle row = "                       
                                                 << row_sum<<endl;                       
                                   
                                                 //loop for sum of column                       
                                                 for                                     (                                     int                                     i = 0; i < n; i++)                       
                                                 col_sum += mat[i][n / 2];                       
                                   
                                                 cout <<                                     "Sum of middle column = "                       
                                                 << col_sum;                       
                         }                       
           
                         // Driver function                       
                         int                                     main()                       
                         {                       
                                                 int                                     mat[][MAX] = {{2, 5, 7},                       
                                                 {3, 7, 2},                       
                                                 {5, 6, 9}};                       
                                   
                                                 middlesum(mat, 3);                       
                                   
                                                 return                                     0;                       
                         }                       

JAVA

                         // java  program to find sum of                       
                         // middle row and column in matrix                       
           
                         import                                     java.io.*;                       
           
                         class                                     GFG {                       
                                   
           
                         static                                     int                                     MAX =                                     100                                     ;                       
           
                                                 static                                     void                                     middlesum(                                     int                                     mat[][],                                     int                                     n)                       
                         {                       
           
                                                 int                                     row_sum =                                     0                                     , col_sum =                                     0                                     ;                       
                                   
                                                 // loop for sum of row                       
                                                 for                                     (                                     int                                     i =                                     0                                     ; i < n; i++)                       
                                                 row_sum += mat[n /                                     2                                     ][i];                       
                                   
                                                 System.out.println (                                     "Sum of middle row = "                       
                                                 + row_sum);                       
                                   
                                                 // loop for sum of column                       
                                                 for                                     (                                     int                                     i =                                     0                                     ; i < n; i++)                       
                                                 col_sum += mat[i][n /                                     2                                     ];                       
                                   
                                                 System.out.println (                                     "Sum of middle column = "                       
                                                 + col_sum);                       
                         }                       
           
                         // Driver function                       
                                                 public                                     static                                     void                                     main (String[] args) {                       
                                                 int                                     mat[][] = {{                                     2                                     ,                                     5                                     ,                                     7                                     },                       
                                                 {                                     3                                     ,                                     7                                     ,                                     2                                     },                       
                                                 {                                     5                                     ,                                     6                                     ,                                     9                                     }};                       
                                   
                                                 middlesum(mat,                                     3                                     );                       
                                   
                                                 }                       
                         }                       
           
                         // This code is contributed by vt_m.                       

Python3

                         # Python program to find sum of                       
                         # middle row and column in matrix                       
           
                                   
                         def                                     middlesum(mat,n):                       
                                   
                                                 row_sum                                     =                                     0                       
                                                 col_sum                                     =                                     0                       
                                   
                                                 # loop for sum of row                       
                                                 for                                     i                                     in                                     range                                     (n):                       
                                                 row_sum                                     +                                     =                                     mat[n                                     /                                     /                                     2                                     ][i]                       
                                   
                                                 print                                     (                                     "Sum of middle row = "                                     ,                       
                                                 row_sum)                       
                                   
                                                 # loop for sum of column                       
                                                 for                                     i                                     in                                     range                                     (n):                       
                                                 col_sum                                     +                                     =                                     mat[i][n                                     /                                     /                                     2                                     ]                       
                                   
                                                 print                                     (                                     "Sum of middle column = "                                     ,                       
                                                 col_sum)                       
           
                         # Driver code                       
                         mat                                     =                                     [[                                     2                                     ,                                     5                                     ,                                     7                                     ],                       
                                                 [                                     3                                     ,                                     7                                     ,                                     2                                     ],                       
                                                 [                                     5                                     ,                                     6                                     ,                                     9                                     ]]                       
                                   
                         middlesum(mat,                                     3                                     )                       
           
                         # This code is contributed                       
                         # by Anant Agarwal.                       

C#

                         // C# program to find sum of                       
                         // middle row and column in matrix                       
                         using                                     System;                       
           
                         class                                     GFG {                       
                                   
           
                                                 //static int MAX = 100;                       
                                   
                                                 static                                     void                                     middlesum(                                     int                                     [,]mat,                                     int                                     n)                       
                                                 {                       
                                   
                                                 int                                     row_sum = 0, col_sum = 0;                       
                                   
                                                 // loop for sum of row                       
                                                 for                                     (                                     int                                     i = 0; i < n; i++)                       
                                                 row_sum += mat[n / 2, i];                       
                                   
                                                 Console.WriteLine (                                     "Sum of middle row = "                       
                                                 + row_sum);                       
                                   
                                                 // loop for sum of column                       
                                                 for                                     (                                     int                                     i = 0; i < n; i++)                       
                                                 col_sum += mat[i, n / 2];                       
                                   
                                                 Console.WriteLine (                                     "Sum of middle column = "                       
                                                 + col_sum);                       
                                                 }                       
           
                                                 // Driver function                       
                                                 public                                     static                                     void                                     Main () {                       
                                                 int                                     [,]mat = {{2, 5, 7},                       
                                                 {3, 7, 2},                       
                                                 {5, 6, 9}};                       
                                   
                                                 middlesum(mat, 3);                       
                                   
                                                 }                       
                         }                       
           
                         // This code is contributed by vt_m.                       

PHP

                         <?php                       
                         // PHP program to find sum of                       
                         // middle row and column in matrix                       
           
                         function                                     middlesum(                                     $mat                                     ,                                     $n                                     )                       
                         {                       
           
                                                 $row_sum                                     = 0;                                     $col_sum                                     = 0;                       
                                   
                                                 //loop for sum of row                       
                                                 for                                     (                                     $i                                     = 0;                                     $i                                     <                                     $n                                     ;                                     $i                                     ++)                       
                                                 $row_sum                                     +=                                     $mat                                     [                                     $n                                     / 2][                                     $i                                     ];                       
                                   
                                                 echo                                     "Sum of middle row = "                       
                                                 ,                                     $row_sum                                     ,                                     ""                                     ;                       
                                   
                                                 //loop for sum of column                       
                                                 for                                     (                                     $i                                     = 0;                                     $i                                     <                                     $n                                     ;                                     $i                                     ++)                       
                                                 $col_sum                                     +=                                     $mat                                     [                                     $i                                     ][                                     $n                                     / 2];                       
                                   
                                                 echo                                     "Sum of middle column = "                       
                                                 ,                                     $col_sum                                     ;                       
                         }                       
           
                         // Driver function                       
           
                                                 $mat                                     =                                     array                                     (                                     array                                     (2, 5, 7),                       
                                                 array                                     (3, 7, 2),                       
                                                 array                                     (5, 6, 9));                       
                                   
                                                 middlesum(                                     $mat                                     , 3);                       
                                   
                         // This code is contributed by anuj_67.                       
                         ?>                       

Javascript

                         <script>                       
           
                         // Javascript  program to find sum of                       
                         // middle row and column in matrix                       
                         var                                     MAX = 100;                       
           
                                                 function                                     middlesum(mat , n)                       
                                                 {                       
           
                                                 var                                     row_sum = 0, col_sum = 0;                       
           
                                                 // loop for sum of row                       
                                                 for                                     (i = 0; i < n; i++)                       
                                                 row_sum += mat[parseInt(n / 2)][i];                       
           
                                                 document.write(                       
                                                 "Sum of middle row = "                                     + row_sum+                                     "<br/>"                       
                                                 );                       
           
                                                 // loop for sum of column                       
                                                 for                                     (i = 0; i < n; i++)                       
                                                 col_sum += mat[i][parseInt(n / 2)];                       
           
                                                 document.write(                       
                                                 "Sum of middle column = "                                     + col_sum                       
                                                 );                       
                                                 }                       
           
                                                 // Driver function                       
                                   
                                                 var                                     mat = [ [ 2, 5, 7 ],                       
                                                 [ 3, 7, 2 ],                       
                                                 [ 5, 6, 9 ] ];                       
           
                                                 middlesum(mat, 3);                       
           
                         // This code contributed by aashish1995                       
           
                         </script>                       

输出：

Sum of middle row = 12Sum of middle column = 18

时间复杂性： O（n）

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