/* Program 1.5.1 from C++ Programming Lecture notes  */

// Lines which begin with double slashes like this are 
// comment lines and are ignored by the compiler.

/* Comments can also be written starting with a slash 
followed by a star, and ending with a star followed by
a slash. As you can see, comments written in this way 
can span more than one line. */
 
/* Programs should ALWAYS include plenty of comments! */
 
/* Author: Rob Miller and William Knottenbelt
   Program last changed: 30 September 2023    */
    
/* This program prompts the user for the current year, the user's 
current age, and another year. It then calculates the age
that the user was or will be in the second year entered. */ 

#include <iostream>

using namespace std;

int main()
{
	int year_now, age_now, another_year, another_age;
	
	cout << "Enter the current year then press RETURN.\n";
	cin >> year_now;
	
	cout << "Enter your current age in years.\n";
	cin >> age_now;
	
	cout << "Enter the year for which you wish to know your age.\n";
	cin >> another_year;
	
	another_age = another_year - (year_now - age_now);
	if (another_age >= 0) {
		cout << "Your age in " << another_year << ": ";
		cout << another_age << "\n";
	} else {
		cout << "You weren't even born in ";
		cout << another_year << "!\n";
	}
		
	return 0;
}