Introduction
I have used CodeBlocks compiler for debugging purpose. But you can use any C programming language compiler as per your availability.
#include <stdio.h> int main() { int a[10][10], b[10][10], result[10][10], r1, c1, r2, c2, i, j, k; printf("Enter rows and column for first matrix: "); scanf("%d %d", &r1, &c1); printf("Enter rows and column for second matrix: "); scanf("%d %d",&r2, &c2); // Column of first matrix should be equal to column of second matrix and while (c1 != r2) { printf("Error! column of first matrix not equal to row of second.\n\n"); printf("Enter rows and column for first matrix: "); scanf("%d %d", &r1, &c1); printf("Enter rows and column for second matrix: "); scanf("%d %d",&r2, &c2); } // Storing elements of first matrix. printf("\nEnter elements of matrix 1:\n"); for(i=0; i<r1; ++i) for(j=0; j<c1; ++j) { printf("Enter elements a%d%d: ",i+1, j+1); scanf("%d", &a[i][j]); } // Storing elements of second matrix. printf("\nEnter elements of matrix 2:\n"); for(i=0; i<r2; ++i) for(j=0; j<c2; ++j) { printf("Enter elements b%d%d: ",i+1, j+1); scanf("%d",&b[i][j]); } // Initializing all elements of result matrix to 0 for(i=0; i<r1; ++i) for(j=0; j<c2; ++j) { result[i][j] = 0; } // Multiplying matrices a and b and // storing result in result matrix for(i=0; i<r1; ++i) for(j=0; j<c2; ++j) for(k=0; k<c1; ++k) { result[i][j]+=a[i][k]*b[k][j]; } // Displaying the result printf("\nOutput Matrix:\n"); for(i=0; i<r1; ++i) for(j=0; j<c2; ++j) { printf("%d ", result[i][j]); if(j == c2-1) printf("\n\n"); } return 0; }