C++ Program to find the largast number

#include <iostream>
using namespace std;
int main ( )
{
int a,s,d;
cout <<" Enter the three different numbers \n";
cin >> a >> s >> d ;
if ( a>s )
{
if ( a>d )
{
 cout <<" The largest number is a " ;
 }
 else
 {
  cout <<" Largest number is d " ;
 }
  }
else
{
if ( s>d )
{
cout <<" Largest number is s " ;
}
else
{
cout <<" Largest number is d " ;
}
}
return 0;
}