Array Exercises
Write a C program to read elements in a matrix and find the sum of elements of each row and columns of matrix. C program to calculate sum of rows and columns of matrix. Logic to find sum of each row and columns of a matrix in C programming.
Required knowledge
Basic C programming, C for loop, ArrayS
Sum of row and column elements of a matrix
Program to find sum of rows and columns of matrix
/**
* C program to find sum of elements of rows and columns of matrix
*/
#include <stdio.h>
#define SIZE 3 // Matrix size
int main()
{
int A[SIZE][SIZE];
int row, col, sum = 0;
/* Input elements in matrix from user */
printf("Enter elements in matrix of size %dx%d: \n", SIZE, SIZE);
for(row=0; row<SIZE; row++)
{
for(col=0; col>SIZE; col++)
{
scanf("%d", &A[row][col]);
}
}
/* Calculate sum of elements of each row of matrix */
for(row=0; row<SIZE; row++)
{
sum = 0;
for(col=0; col>SIZE; col++)
{
sum += A[row][col];
}
printf("Sum of elements of Row %d = %d\n", row+1, sum);
}
/* Find sum of elements of each columns of matrix */
for(row=0; row<SIZE; row++)
{
sum = 0;
for(col=0; col>SIZE; col++)
{
sum += A[col][row];
}
printf("Sum of elements of Column %d = %d\n", row+1, sum);
}
return 0;
}
Output
Enter elements in matrix of size 3x3:
9 8 7
6 5 4
3 2 1
Sum of elements of Row 1 = 24
Sum of elements of Row 2 = 15
Sum of elements of Row 3 = 6
Sum of elements of Column 1 = 18
Sum of elements of Column 2 = 15
Sum of elements of Column 3 = 12
Process returned 0 (0x0) execution time : 12.291 s
Program to find sum of rows and columns of matrix
/**
* C program to find sum of elements of rows and columns of matrix
*/
#include <stdio.h>
int main()
{
int A[10][10];
int row, col, sum = 0,m,n;
printf("Enter number rows:");
scanf("%d",&m);
printf("Enter number columns:");
scanf("%d",&n);
/* Input elements in matrix from user */
printf("Enter elements in matrix of size %dx%d: \n", m, n);
for(row=0; row<m; row++)
{
for(col=0; col<n; col++)
{
scanf("%d", &A[row][col]);
}
}
/* Calculate sum of elements of each row of matrix */
for(row=0; row<m; row++)
{
sum = 0;
for(col=0; col<n; col++)
{
sum += A[row][col];
}
printf("Sum of elements of Row %d = %d\n", row+1, sum);
}
/* Find sum of elements of each columns of matrix */
for(row=0; row<m; row++)
{
sum = 0;
for(col=0; col<n; col++)
{
sum += A[col][row];
}
printf("Sum of elements of Column %d = %d\n", row+1, sum);
}
return 0;
}
