to find which is greatrer

#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
float a,b,c;
cout<<" enter first number:: ";
cin>>a;
cout<<" enter second number:: ";
cin>>b;
cout<<" enter third number:: ";
cin>>c;
if(a>b)
 {if(a>c)
   cout<<"  "<< a <<" is greater ";
  else
   cout<<"  "<< c <<" is greater ";
 }
else
 {if(b>c)
   cout<<"  "<< b <<" is greater ";
  else
   cout<<"  "<< c <<" is greater ";
 }
getch();
}