#include <iostream>
#include <cstring>
int main() {
std::string s1 = "C++ Programming";
std::string s2 = "C++ PrograMMING";
if (strncasecmp(s1.c_str(), s2.c_str(), 5) == 0) {
std::cout << "s1 == s2";
} else {
std::cout << "s1 != s2";
}
return 0;
}
/*
run:
s1 == s2
*/