如何从单个变量中删除字符串

string = "Hello, World!"
new_string = string.replace("World", "")

let string = "Hello, World!";
let new_string = string.replace("World", "");

String string = "Hello, World!";
String new_string = string.replaceAll("World", "");

#include <iostream>
#include <string>

int main() {
    std::string str = "Hello, World!";
    str.erase(str.find("World"), 5);
    std::cout << str << std::endl;
    return 0;
}