Write A C++ Program To Multiply Any Two 3 X 3 Matrices.

#include<iostream.h>
#include<conio.h>
void main( )
{
           int mat1 [3][3], mat2[3][3],mat3[3][3], i ,j, k, sum; 
           clrscr( ) ;
           cout<<"\nEnter values for first 3 x 3 matrix:\n";
           for ( i = 0 ; i <= 2 ; i++ )
                {
                   for (j = 0 ; j <= 2 ; j++ )
                        cin>>mat1 [i][j] ;
                }
                        cout<<"\n Enter values for second 3 x 3 matrix:\n";
                   for ( i = 0 ; i <= 2 ; i++ )
                        {
                            for ( j = 0 ; j <= 2 ; j++ )
                                   cin>>mat2[i][j] ;
                        }
                       cout<<"\n The first 3 x 3 matrix entered by you is:\n";
                            for ( i = 0 ; i <= 2 ; i++ )
                                 {
                                       for ( j = 0 ; j <= 2 ; j++ )
                                              cout<<"\t"<< mat1[i][j] ;
                                              cout<<"\n";
                                 }
                                              cout<<"\n the second 3 x 3 matrix entered :\n";
                                       for ( i = 0 ; i <= 2 ; i++ )
                                            {
                                                for ( j = 0 ; j <= 2 ; j++ )
                                                       cout<<"\t"<< mat2[i][j] ;
                                                       cout<<"\n";
                                            }
                                       for ( i = 0 ; i <= 2 ; i++ )
                                            {
                                                for ( j = 0 ; j <= 2 ; j++ )
                                                      {
                                                          sum = 0;
                                                            for ( k = 0 ; k <=2 ; k++ )
                                                                   sum = sum + mat1 [i][k] * mat2[k][j];
                                                                   mat3[i][j] = sum ;
                                                       }
                                             }
                                                                   cout<<"\nThe product of the above two matrices is:\n";
                                                                   for ( i = 0 ;i<= 2 ; i++ )
                                                                        {
                                                                             for ( j = 0 ; j <= 2 ; j++ )
                                                                                      cout<<"\t"<<mat3[i][j] ;
                                                                                      cout<<"\n";
                                                                         }
                                                                                      cout<<"\n Press any key to exit.";
                                                                                      getch( ) ;
}