A program to multiply two matrices.
#include<stdio.h>
void multiply(int mat1[12][12],int mat2[12][12],int ,int ,int );
void main()
{
int mat1[12][12],mat2[12][12];
int i,j,k,m,n,p;
printf("Enter the number of rows and columns for 1st matrix\n");
scanf("%d%d",&m,&n);
printf("Enter the elements of the 1st matrix\n");
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
{
scanf("%d",&mat1[i][j]);
}
}
//no of col of 1st mat = no of rows of 2nd mat
printf("Enter the number of columns for 2nd matrix\n");
scanf("%d",&p);
printf("Enter the elements of the 2nd matrix\n");
for(i=0;i<n;i++)
{
for(j=0;j<p;j++)
{
scanf("%d",&mat2[i][j]);
}
}
printf("The 1st matrix\n");
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
{
printf("%d\t",mat1[i][j]);
}
printf("\n");
}
printf("The 2nd matrix\n");
for(i=0;i<n;i++)
{
for(j=0;j<p;j++)
{
printf("%d\t",mat2[i][j]);
}
printf("\n");
}
multiply(mat1,mat2,m,n,p);
}
void multiply(int mat1[12][12],int mat2[12][12],int m,int n,int p)
{
int mul[12][12],i,j,k;
for(i=0;i<m;i++)
{
for(j=0;j<p;j++)
{
mul[i][j]=0;
for(k=0;k<n;k++)
{
mul[i][j]=mul[i][j]+mat1[i][k]*mat2[k][j];
}
}
}
printf("The resultant matrix formed on multiplying the two matrices\n");
for(i=0;i<m;i++)
{
for(j=0;j<p;j++)
{
printf("%d\t",mul[i][j]);
}
printf("\n");
}
}
Run code
