program for matrix multiplication

c program code  for matrix multiplication
#include<stdio.h>
#include<conio.h>
void main()
{
int a[20][20],b[20][20],c[20][20],i,j,m,n,m2,n2,k;
clrscr();
printf("enter the rows and columns of the first matrics\n");
scanf("%d%d",&m,&n);
printf("Enter the first matrics\n");
for(i=0;i<m;i++)
 {
  for(j=0;j<n;j++)
      {
      scanf("%d",&a[i][j]);    //reads first matrics
      }
 }
 printf("enter the rows and columns of the SECOND  matrics\n");
scanf("%d%d",&m2,&n2);
printf("Enter the second matrics\n");
for(i=0;i<m2;i++)
 {
  for(j=0;j<n2;j++)
      {
      scanf("%d",&b[i][j]);     reads second matrics
      }
  }
 printf("The matrics product \n");
for(i=0;i<m;i++)
 {
  for(j=0;j<n2;j++)
   {   c[i][j]=0;

      for(k=0;k<n;k++)
      {
      c[i][j]+=a[i][k]*b[k][j];
      }
     printf("%d   ",c[i][j]);
   }
    printf("\n");
  }

  getch();
  }