C Exercises: Find the sum of rows an columns of a Matrix

C Array: Exercise-25 with Solution

Write a program in C to find the sum of rows and columns of a matrix.

Visual Presentation:

Sample Solution:

C Code:

#include <stdio.h>

int main() {
    int i, j, k, arr1[10][10], rsum[10], csum[10], n;

    // Display the purpose of the program
    printf("\n\nFind the sum of rows and columns of a Matrix:\n");
    printf("-------------------------------------------\n");

    // Input the size of the square matrix
    printf("Input the size of the square matrix : ");
    scanf("%d", &n);

    // Input elements into the matrix
    printf("Input elements in the matrix :\n");
    for (i = 0; i < n; i++) {
        for (j = 0; j < n; j++) {
            printf("element - [%d],[%d] : ", i, j);
            scanf("%d", &arr1[i][j]);
        }
    }

    // Display the matrix
    printf("The matrix is :\n");
    for (i = 0; i < n; i++) {
        for (j = 0; j < n; j++) {
            printf("% 4d", arr1[i][j]);
        }
        printf("\n");
    }

    // Calculate the sum of rows
    for (i = 0; i < n; i++) {
        rsum[i] = 0;
        for (j = 0; j < n; j++) {
            rsum[i] = rsum[i] + arr1[i][j];
        }
    }

    // Calculate the sum of columns
    for (i = 0; i < n; i++) {
        csum[i] = 0;
        for (j = 0; j < n; j++) {
            csum[i] = csum[i] + arr1[j][i];
        }
    }

    // Display the matrix with row sums
    printf("The sum of rows and columns of the matrix is :\n");
    for (i = 0; i < n; i++) {
        for (j = 0; j < n; j++) {
            printf("% 4d", arr1[i][j]);
        }
        printf("% 8d", rsum[i]); // Print the sum of each row
        printf("\n");
    }

    // Display the column sums
    printf("\n");
    for (j = 0; j < n; j++) {
        printf("% 4d", csum[j]); // Print the sum of each column
    }
    printf("\n\n");

    return 0;
}

Sample Output:

Find the sum of rows an columns of a Matrix:                                                                  
-------------------------------------------                                                                   
Input the size of the square matrix : 2                                                                       
Input elements in the first matrix :                                                                          
element - [0],[0] : 5                                                                                         
element - [0],[1] : 6                                                                                         
element - [1],[0] : 7                                                                                         
element - [1],[1] : 8                                                                                         
The matrix is :                                                                                               
   5   6                                                                                                      
   7   8                                                                                                      
The sum or rows and columns of the matrix is :                                                                
   5   6      11                                                                                              
   7   8      15                                                                                              
                                                                                                              
  12  14 

Flowchart:

C Programming Code Editor:

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