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C Program – Multiplication of two Matrices Example

Here we are going to solve multiplication of two matrices using C Program.

Multiplication of two Matrices :

#include<stdio.h>
#define ROW1 3
#define COL1 4
#define ROW2 COL1
#define COL2 3
int main(void) {
    int i, j, k;
    int matx1[ROW1][COL1], matx2[ROW2][COL2], matx3[ROW1][COL2];
    printf("Enter Matrix 1 (%dx%d) :\n", ROW1, COL1);
    for (i = 0; i < ROW1; i++) {
        for (j = 0; j < COL1; j++) {
            scanf("%d", &matx1[i][j]);
        }
    }

    printf("Enter Matrix 2 (%dx%d) :\n", ROW2, COL2);
    for (i = 0; i < ROW2; i++) {
        for (j = 0; j < COL2; j++) {
            scanf("%d", &matx2[i][j]);
        }
    }

    /*Multiplication Logic Here*/
    for (i = 0; i < ROW1; i++) {
        for (j = 0; j < COL2; j++) {
            matx3[i][j] = 0;
            for (k = 0; k < COL1; k++){
                matx3[i][j] += matx1[i][k] * matx2[k][j];
            }
        }
    }

    printf("The Resultant Matrix is :\n");
    for (i = 0; i < ROW1; i++) {
        for (j = 0; j < COL2; j++)
            printf("%5d", matx3[i][j]);
        printf("\n");
    }
    return 0;
}

Enter Matrix 1 (3×4) :
1 2 3 4
7 8 9 4
9 8 7 5
Enter Matrix 2 (4×3) :
4 5 6
7 8 9
1 2 3
3 6 9
The Resultant Matrix is :
33   51   69
105  141  177
114  153  192

Happy Learning 🙂

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