m×n n×q = m×q
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Write a program in C for multiplication of two square Matrices.
#include<stdio.h>
int main()
{
int a[10][10],b[10][10],result[10][10];
int i,j,r1,c1,r2,c2;
int sum,k;
printf("Enter number of Rows of matrix a: ");
scanf("%d",&r1);
printf("Enter number of Cols of matrix a: ");
scanf("%d",&c1);
printf("Enter number of Rows of matrix b: ");
scanf("%d",&r2);
printf("Enter number of Cols of matrix b: ");
scanf("%d",&c2);
/*Testing the multiplication rule of two matrix*/
if(c1==r2) //col1 and row2 comparision
{ //if conditon begin
/*---------------------------------------------------*/
printf("\n Enter elements of matrix a: \n");
for(i=0;i< r1;i++) //row times repeation
{
for(j=0;j< c1;j++) //col times repeation
{
scanf("%d",&a[i][j]);
}
}
/*---------------------------------------------------*/
printf("\nEnter elements of matrix b: \n");
for(i=0;i< r2;i++) //row times repeation
{
for(j=0;j< c2;j++) //col times repeation
{
scanf("%d",&b[i][j]);
}
}
/*---------------------------------------------------*/
/*Multiplication of two matrices*/
for(i=0;i<r1;i++)
{
for(j=0;j< c2;j++)
{
sum=0;
for(k=0;k<c1;k++)
{
sum=sum + (a[i][k]*b[k][j]);
}
result[i][j]=sum;
}
}
/*---------------------------------------------------*/
/* Multiplication output*/
for(i=0;i< r1;i++)
{
for(j=0;j< c2;j++)
{
printf("result of multiplication is [%d,%d] : ",i,j);
printf("%d\n",result[i][j]);
}
}
} //if condition close
/*---------------------------------------------------*/
else
{
printf("\nMultiplication can not be done.");
}
return 0;
}
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
OUTPUT
Enter number of Rows of matrix a: 2
Enter number of Cols of matrix a: 2
Enter number of Rows of matrix b: 2
Enter number of Cols of matrix b: 2
Enter elements of matrix a:
1
2
3
4
Enter elements of matrix b:
1
2
3
4
result of multiplication is [0,0] : 7
result of multiplication is [0,1] : 10
result of multiplication is [1,0] : 15
result of multiplication is [1,1] : 22
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