Program to find HCF of two Numbers in C++ Using Class

1:  #include<iostream.h>  
2:  #include<conio.h>  
3:  class HCF  
4:  {  
5:    int a,b;  
6:    public:  
7:    void gcd();  
8:    void input(){  
9:    cout<<"Enter two numbers  :"<<endl;  
10:    cin>>a>>b;  
11:    }  
12:  };  
13:  void HCF::gcd()  
14:  {  
15:    int m,n;  
16:    m=a;  
17:    n=b;  
18:    while(m!=n)  
19:    {  
20:      if(m>n)  
21:        m=m-n;  
22:      else  
23:        n=n-m;  
24:    }  
25:    cout<<"\nH.C.F of"<<a<<" & "<<b<<" is "<<m;  
26:  }  
27:  int main()  
28:  {  
29:    HCF hcf;  
30:    hcf.input();  
31:    hcf.gcd();  
32:    getch();  
33:   return 0;  
34:  }