#include <iostream>
std::string concatenate_replace(std::string str) {
str.replace(0, 4, "")
.replace(str.find("high"), 4, "HIGH")
.replace(str.find("purpose"), 7, "");
return str;
}
int main() {
std::string str = "C++ is a high-level, general-purpose programming language";
str = concatenate_replace(str);
std::cout << str;
}
/*
run:
is a HIGH-level, general- programming language
*/