返回系统日期的C++函数

#include<iostream>
#include <ctime>

int main() {
    std::time_t now = std::time(nullptr);
    std::tm* tm = std::localtime(&now);

    std::cout << "Year: " << tm->tm_year + 1900<< std::endl;
    std::cout << "Month: " << tm->tm_mon + 1<< std::endl;
    std::cout << "Day: " << tm->tm_mday<< std::endl;

    return 0;
}