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// modify uppercase flag
#include <iostream> // std::cout, std::showbase, std::hex
// std::uppercase, std::nouppercase
int main () {
std::cout << std::showbase << std::hex;
std::cout << std::uppercase << 77 << '\n';
std::cout << std::nouppercase << 77 << '\n';
return 0;
}
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