Here is the program for matrix multiplication in C.
m and n are rows and columns of first matrix.
p and q are rows and columns of second matrix.
Then, multiplication is possible only if n==p.
Matrix Multiplication in C
#include<stdio.h> int main() { int a[5][5],b[5][5],c[5][5],m,n,p,q,i,j,k; printf("Enter rows and columns of first matrix:"); scanf("%d%d",&m,&n); printf("Enter rows and columns of second matrix:"); scanf("%d%d",&p,&q); if(n==p) { printf("\nEnter first matrix:\n"); for(i=0;i<m;++i) for(j=0;j<n;++j) scanf("%d",&a[i][j]); printf("\nEnter second matrix:\n"); for(i=0;i<p;++i) for(j=0;j<q;++j) scanf("%d",&b[i][j]); printf("\nThe new matrix is:\n"); for(i=0;i<m;++i) { for(j=0;j<q;++j) { c[i][j]=0; for(k=0;k<n;++k) c[i][j]=c[i][j]+(a[i][k]*b[k][j]); printf("%d ",c[i][j]); } printf("\n"); } } else printf("\nSorry!!!! Matrix multiplication can't be done"); return 0; }
Output
Enter rows and columns of first matrix:3
3
Enter rows and columns of second matrix:3
3
Enter first matrix:
1 2 3
4 5 6
7 8 9
Enter second matrix:
9 8 7
6 5 4
3 2 1
The new matrix is:
30 24 18
84 69 54
138 114 90
Comment below if you have any doubts related to above program for matrix multiplication in C
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