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  1. #include <iostream>
  2. #include <ctime>
  3.  
  4. using namespace std;
  5.  
  6. int calculateAge(int birthYear, int birthMonth, int birthDay) {
  7.     // Get current date
  8.     time_t t = time(nullptr);
  9.     tm* now = localtime(&t);
  10.  
  11.     int currentYear = now->tm_year + 1900;
  12.     int currentMonth = now->tm_mon + 1;
  13.     int currentDay = now->tm_mday;
  14.  
  15.     // Calculate age
  16.     int age = currentYear - birthYear;
  17.  
  18.     // Adjust for whether birthday has occurred this year
  19.     if (currentMonth < birthMonth || (currentMonth == birthMonth && currentDay < birthDay)) {
  20.         age--;
  21.     }
  22.  
  23.     return age;
  24. }
  25.  
  26. int main() {
  27.     int birthYear, birthMonth, birthDay;
  28.  
  29.     cout << "Enter your birth year: ";
  30.     cin >> birthYear;
  31.     cout << "Enter your birth month (1-12): ";
  32.     cin >> birthMonth;
  33.     cout << "Enter your birth day: ";
  34.     cin >> birthDay;
  35.  
  36.     int age = calculateAge(birthYear, birthMonth, birthDay);
  37.  
  38.     cout << "Your age is: " << age << " years old." << endl;
  39.  
  40.     return 0;
  41. }
Success #stdin #stdout 0.01s 5320KB
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Enter your birth year: Enter your birth month (1-12): Enter your birth day: Your age is: -19972 years old.
https://ideone.com/lRgvu8
language:
C++ (gcc 8.3)
created:
5 hours ago
visibility:
public

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