Check Prototype in C++

#include<iostream
#include<Windows.h>
using namespace std;
int main ( )
{
int x,y,z;
system("color 5f");
char ch;
char t ='\xCD';
int whole ;
char letter ;
double fraction ;
cout<<" whole "<<"fraction"<<"letter"<<endl;
cin>>whole>>fraction>>letter;
cout<< "whole"<<whole<<endl;
cout<<"fraction"<<fraction <<endl;
cout<<"letter"<<letter<<endl;
return(0);
}