Multiplication of Matrices

#include<iostream.h>
#include<conio.h>
#define max 10


 void in_mat(int[max][max],int,int);
 void disp_mat(int[max][max],int,int);
 void mul_mat(int[max][max],int[max][max],int[max][max],int,int,int);


 void main()
  {
   int x[max][max],y[max][max],z[max][max],a,b,c,d;
   clrscr();
   do
   {
   cout<<"\n\n Enter the numbers of rows n columns of matrix #1 : ";
   cin>>a>>b;
   cout<<"\n\n Enter the numbers of rows n columns of matrix #2 : ";
   cin>>c>>d;
   if ( b != c )
    cout<<"\n\n Matrices can't be multiplied .. !! ";
   }while( b != c );
   cout<<"\n\n Now, The Matrices can be multiplied .. !! ";
   getch();


   cout<<"\n\n\n\n Enter the elements for the following matrices \n";
   cout<<"\n\n Enter for the Matrix #1 \n";
   in_mat(x,a,b);
   cout<<"\n\n Enter for the Matrix #2 \n";
   in_mat(y,c,d);
   clrscr();
   cout<<"\n\n The following matrices are : ";
   cout<<"\n\n\t\t Matrix #1 :- ";
   disp_mat(x,a,b);
   cout<<"\n\n\t\t Matrix #2 :- ";
   disp_mat(y,c,d);
   mul_mat(x,y,z,a,d,b);
   cout<<"\n\n\t The Product of the above two matrices are \n";
   disp_mat(z,a,d);
   getch();
  }


 void in_mat(int mat[max][max],int row,int col)
  {
   int i,j;
   for(i=0;i<row;i++)
    {
     cout<<"\n Enter its elements for Row #"<<i+1<<" : ";
     for(j=0;j<col;j++)
       cin>>mat[i][j];
    }
  }


 void disp_mat(int mat[max][max],int row,int col)
  {
   int i,j;
   for(i=0;i<row;i++)
    {
     cout<<"\n\t Row #"<<i+1<<" :";
     for(j=0;j<col;j++)
      cout<<"  "<<mat[i][j];
    }
  }


 void mul_mat(int mat1[max][max],int mat2[max][max],int mat3[max][max],int r1,int c2,int r2c1)
  {
   int i,j,k;
   for(i=0;i<r1;i++)
    {
     for(j=0;j<c2;j++)
      {
       mat3[i][j] = 0;
       for(k=0;k<r2c1;k++)
mat3[i][j] += mat1[i][k] * mat2[k][j];
      }
    }
  }