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C Program To Multiply Two Matrices Using Multi-dimensional Arrays.

#include <stdio.h>
int main() {
int a[10][10], b[10][10], mult[10][10], r1, c1, r2, c2, i, j, k;

printf("Enter Rows and Columns for First Matrix:\n");
scanf("%d%d", &r1, &c1);
printf("\nEnter Rows and Columns for Second Matrix:\n");
scanf("%d%d",&r2, &c2);

while (c1!=r2) {
printf("\nWrong Input: Column of First Matrix is Not Equal to Row of Second Matrix.\n\n");

printf("\nEnter Rows and Columns for First Matrix:\n");
scanf("%d%d", &r1, &c1);
printf("\nEnter Rows and Columns for Second Matrix:\n");
scanf("%d%d",&r2, &c2);
}

printf("\nEnter Elements of Matrix 1:\n");
for(i=0; i<r1; ++i)
for(j=0; j<c1; ++j)
{
printf("Enter Element a%d%d: ",i+1,j+1);
scanf("%d",&a[i][j]);
}

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]);
}

for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j)
{
mult[i][j]=0;
}

for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j)
for(k=0; k<c1; ++k)
{
mult[i][j]+=a[i][k]*b[k][j];
}

printf("\nMatrix Multiplication Result:\n\n");
for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j)
{
printf("%d  ",mult[i][j]);
if(j==c2-1)
printf("\n\n");
}
return 0;
}
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