Phương thức (hàm thành viên)

#include <iostream>
#include "StringHelper.h"

int main() {
    std::string input;
    std::getline(std::cin, input);
    
    StringHelper helper;
    helper.text = input;
    
    std::cout << "Original: " << helper.text << std::endl;
    std::cout << "Length: " << helper.getLength() << std::endl;
    std::cout << "Uppercase: " << helper.toUpperCase() << std::endl;
    std::cout << "Contains 'World': " << (helper.contains("World") ? "yes" : "no") << std::endl;
    std::cout << "Repeated: " << helper.repeat(3) << std::endl;
    return 0;
}