Answer Posted / shankey narang

// write a program to multipication of a matrix
#include<stdio.h>
#include<conio.h>
#include<alloc.h>
void main()
{
int *ptr1,*ptr2,*ptr3;
int m,n,i,j,k;
printf("enter m & n=");
scanf("%d%d",&m,&n);
ptr1=(int*)malloc((m*n)*sizeof(int));
ptr2=(int*)malloc((m*n)*sizeof(int));
ptr3=(int*)malloc((m*n)*sizeof(int));
printf("enter elements of 1st matrix=");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
scanf("%d",((ptr1+i)+j)) ;
}
}
printf("enter elements of 2nd matrix=");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
scanf("%d",((ptr2+i)+j)) ;
}
}
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
*((ptr3+i)+j)=0;
for(k=0;k<n;k++)
{
*((ptr3+i)+j)=*((ptr3+i)+j)+(*((ptr1+i)+j))*(*((ptr2+j)+k));
}
}
}
printf("multipication is=\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
printf("%d\t",*((ptr3+i)+j)) ;
}
printf("\n");
}
getch();
}

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