C Programming Code Examples

C > Arrays and Matrices Code Examples

C program to add two matrices



C program to add two matrices

Write a C program to read elements in two matrices and add elements of both matrices. C program for addition of two matrix. Matrix addition program in C. Logic to add two matrix in C programming.

/**
 * C program to find sum of two matrices of size 3x3
 */

#include <stdio.h>

#define SIZE 3 // Size of the matrix

int main()
{
    int M1[SIZE][SIZE]; // Matrix 1
    int M2[SIZE][SIZE]; // Matrix 2
    int M3[SIZE][SIZE]; // Resultant matrix

    int row, col;

    /* Input elements in first matrix*/
    printf("Enter elements in matrix M1 of size 3x3: \n");
    for(row=0; row<SIZE; row++)
    {
        for(col=0; col<SIZE; col++)
        {
            scanf("%d", &M1[row][col]);
        }
    }

    /* Input elements in second matrix */
    printf("\nEnter elements in matrix M2 of size 3x3: \n");
    for(row=0; row<SIZE; row++)
    {
        for(col=0; col<SIZE; col++)
        {
            scanf("%d", &M2[row][col]);
        }
    }

    /*
     * Add both matrices M1 and M2 entry wise or element wise
     * and stores result in matrix M3
     */
    for(row=0; row<SIZE; row++)
    {
        for(col=0; col<SIZE; col++)
        {
            /* M3ij = M1ij + M2ij */
            M3[row][col] = M1[row][col] + M2[row][col];
        }
    }


    /* Print the value of resultant matrix M3 */
    printf("\nSum of matrices M1+M2 = \n");
    for(row=0; row<SIZE; row++)
    {
        for(col=0; col<SIZE; col++)
        {
            printf("%d ", C[row][col]);
        }
        printf("\n");
    }

    return 0;
}