#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;
}
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