没有getline的重载函数实例

istream& getline (istream& is, string& str, char delim);

#include <iostream>
#include <string>
#include <sstream>

void customGetline(std::istream& is, std::string& str) {
    std::getline(is, str);
    
    std::istringstream iss(str);
    std::string word;
    while (iss >> word) {
        if (std::isdigit(word[0])) {
            std::cout << word << std::endl;
        }
    }
}

int main() {
    std::string input;
    customGetline(std::cin, input);
    
    return 0;
}