C++ 字符串逆序输出

#include <iostream>

std::string FirstReverse(std::string str) {
    std::string newstring;
    for(auto it = str.cend()-1; it != str.cbegin()-1; --it){
        newstring += *it;
    }
    return newstring;
}

int main() {
    
    std::string str = "Argument goes here";
    std::cout << FirstReverse(str)<<std::endl;
    return 0;
    
}