#include <iostream>
#include <vector>
#include <utility>
#include <cctype>
 
using namespace std;
 
typedef pair<int,int> out_in;
 
template<typename F>
bool check(F&& f, vector<out_in> const& tests)
{
	for(auto const& p : tests){
		int result;
		if((result = f(p.second)) != p.first){
			cout << "Test failed! F(" << p.second << ") = " << result << ". Expected: " << p.first << endl;
			return false;
		}
	}
	return true;
}
 
int main()
{
	vector<out_in> toUpper = {
		{'A','a'},
		{'A','A'},
		{'0','0'},
		{'B','A'}
	};
 
 
	cout << "testing std::toupper()..." << endl;
	if(check(&::toupper,toUpper)) cout << "Passed!" << endl;
 
}

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