Multiple of Matrix in c++ (perkalian matriks)

A simple code to multiple matrix in c++ :
#include <iostream.h>
#include <conio.h>
#include <iomanip.h>

void main()
{
int A[3][3],B[3][3],C[3][3],i,j,k;
clrscr();

//masukkan matrix A
cout<<"Silahkan input matrik A : \n";
cout<<"------------------------- \n";
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<"Elemen ke "<<(i+1)<<","<<(j+1)<<" : ";
cin>>A[i][j];
}
}

//cetak matrix A
cout<<"\nMatrik A : \n";;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<setw(4)<<A[i][j];
}
cout<<endl;
}
cout<<endl;

//masukkan matriks B
cout<<"Silahkan input matrik B : \n";
cout<<"------------------------- \n";
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<"Elemen ke "<<(i+1)<<","<<(j+1)<<" : ";
cin>>B[i][j];
}
}

//cetak matrix B
cout<<"\nMatrik B : \n";
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<setw(4)<<B[i][j];
}
cout<<endl;
}

//Operasi Perkalian
for (i=0;i<3;i++)
{
for (j=0;j<3;j++)
{
C[i][j]=0;
for (k=0;k< 3;k++)
{
C[i][j]+= A[i][k]*B[k][j];
}
}
}

//Menampilkan hasil
cout<<"\nMatrik C, Hasil : \n";
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
cout<<setw(4)<<C[i][j];
}
cout<<endl;
}
cout<<endl;
getch();

}
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