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:
Previous: Write a program in C to find sum of left diagonals of a matrix.
Next: Write a program in C to print or display the lower triangular of a given matrix.
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