#include <algorithm>
#include <iostream>
#include <string>
 
 class example {
 	static const int x = 5;
 };
 
 
int main()
{
    std::string s("hello world");
    
    std::transform(s.begin(), s.end(), s.begin(),
        [](char c) { return std::toupper(c); });
	
	std::cout << "s is: " << s << std::endl;
	
	return 0;                  
}