C program to multiply and subtract two matrices.

C Programming Computer Science

#include<conio.h>
#include<stdio.h>
int main()
{
int m,n,p,q,c,d,k,sum=0;
int first[10][10], second[10][10], multiply[10][10], difference[10][10];
printf("Enter the number of rows and column of first matrix \n");
scanf("%d%d", &m,&n);
printf("Enter the elements of first matrix\n");
for(c=0;c<m;c++)
for(d=0;d<n;d++)
scanf("%d" &first[c][d]);

printf("Enter the number of rows and column of second matrix\n");
scanf("%d%d", &p,&q);
if(n!=p)
{
printf("Matrices with entered orders cannot be multiplied or subtracted with each other\n");
break; 
}
else
{
printf("Enter the elements of second matrix\n");
for(c=0;c<p;c++)
for(d=0;d<q;d++)
scanf("%d", &second[c][d]);

for(c=0;c<m;c++)
{
for(d=0;d<q;d++)
{
for(k=0;k<p;k++)
{
sum=sum+first[c][k]*second[k][d];
}
multiply[c][d]=sum;
sum=0;
}
}
printf("Product of entered matrices\n");
for(c=0;c<m;c++)
{
for(d=0;d<q;d++)
printf("%d\t", multiply[c][d]);
printf("\n");
}
}
if(m==p && n==q)
{
for(c=0;c<m;c++)
{
for(d=0;d<n;d++)
{
difference[c][d]=first[c][d]-second[c][d];
printf("%d\t",difference[c][d]);
}
printf("\n");
}
return 0;
}

 

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