如何将字符串的最后n个字符与C中的另一个字符串进行比较

#include <iostream>
#include <string>

bool compareLastNCharacters(std::string str, std::string c, int n) {
    std::string lastNCharacters = str.substr(str.length() - n);
    return lastNCharacters == c;
}

int main() {
    std::string str = "Hello World";
    std::string c = "World";
    int n = 5;

    bool result = compareLastNCharacters(str, c, n);
    if (result) {
        std::cout << "The last " << n << " characters match with " << c << std::endl;
    } else {
        std::cout << "The last " << n << " characters do not match with " << c << std::endl;
    }

    return 0;
}