Small program output not correct?

[mrju5t]

This is a 4 hand poker program. I just hit a roadblock which I can't solve. When I run the program and enter values in between 1-10 it's supposed to tell me whether I have a pair, 3 of a kind ,4 of a kind or nothing. I feel like the problem is in the switch command but I haven't been able to get it to work. Please help me thanks.

#include <cstdlib>
#include <cmath>
#include <cassert>
#include <iostream>
	using namespace std;
bool die (const string & msg);
	
int main () {
	unsigned w,x,y,z;
	cout<<"Input 4 card values: ";
	cin>>w>>x>>y>>z || die ("invalid input");
//  Suppose we've discarded the face cards, so legal values are [1, 10]
if (w<1 || w>10 || x<1 || x>10 || y<1 || y>10 || z<1 || z>10)
die ("Out of range: [1,10]");
	switch ( (w==x) + (x==y ) + (y==z) + (z==w))  {
			
		case 0: cout<<"nothing"<<endl; break;
		case 1: cout<<" pair"<<endl; break;
	 	case 3: cout<<"3 of a kind"<<endl; break;
		case 4: cout<<"4 of a kind"<<endl; break;
		default: assert (false);
} // end switch
		} // main

	bool die (const string & msg) {
	cerr<<endl<<"Fatal error: "<<msg<<endl;
	exit (EXIT_FAILURE);
				} // end die 
		

[Fransje]

It works great for me. What's the problem you are getting?

[mrju5t]

Try this input 2 9 9 2. And you will get a "3 of a kind". I have fixed it.