Bài nâng cao 1

#include <iostream>
#include <ctime>
using namespace std;
int main(){
    time_t now = time(0);
    tm *ltm = localtime(&now);
    int year_added;
    int Cur_year = (1900 + ltm->tm_year);
    cout<<"Nhap nam sinh vao : ";
    cin>>year_added;
    cout << Cur_year - year_added;


    return 0;
     }