Write a program in C for multiplication of two square Matrices

Solution:

• In this approach, we read the size of matrix using m and n variables.
• We use the same dimension to read both matrix elements.
• After perform multiplication, we store the results into third matrix.
• Finally we display the elements of resultant matrix.

#include<stdio.h>  
int main()
{  
	int a[10][10],b[10][10],mul[10][10],m,n,i,j,k;    
	printf("Input row size : ");    
	scanf("%d",&m);    
	printf("Enter column size : ");    
	scanf("%d",&n);    
	printf("Enter Matrix-A elements : \n");    
	for(i=0;i<m;i++)    
	{    
		for(j=0;j<n;j++)    
		{    
			scanf("%d",&a[i][j]);    
		}    
	}    
	printf("Enter Matrix-B elements : \n");    
	for(i=0;i<m;i++)    
	{    
		for(j=0;j<n;j++)    
		{    
			scanf("%d",&b[i][j]);    
		}    
	} 	    
	for(i=0;i<m;i++)    
	{    
		for(j=0;j<n;j++)    
		{    
			mul[i][j]=0;    
			for(k=0;k<n;k++)    
			{    
				mul[i][j]+=a[i][k]*b[k][j];    
			}    
		}    
	} 
	printf("Multiplication Matrix is : \n"); 
	for(i=0;i<m;i++)    
	{    
		for(j=0;j<n;j++)    
		{    
			printf("%d\t",mul[i][j]);    
		}    
		printf("\n");    
	}    
	return 0;  
}