如何从main函数返回字符串？

#include <stdio.h>

char* getString() {
    char* str = "Hello, World!";
    return str;
}

int main() {
    char* result = getString();
    printf("%s\n", result);
    return 0;
}

#include <iostream>
#include <string>

std::string getString() {
    std::string str = "Hello, World!";
    return str;
}

int main() {
    std::string result = getString();
    std::cout << result << std::endl;
    return 0;
}

public class Main {
    static String getString() {
        String str = "Hello, World!";
        return str;
    }

    public static void main(String[] args) {
        String result = getString();
        System.out.println(result);
    }
}

def get_string():
    return "Hello, World!"

if __name__ == "__main__":
    result = get_string()
    print(result)