/* CS7 - Assignment 2
 * spring 2004 
 *
 * This program asks the user for his/her age and resting
 * heart rate, then calculates the middle of the range of
 * their training heart rate zone. 
 */
import tio.*;

class youridTHR {
  public static void main (String [] args) {
    int    age,   // user's age in years 
           rhr,	// resting heart rate (usually between 60 & 80)
           mhr;	// max heart rate, depends on age
    double thr;	// training heart rate - holds final answer
		  
    System.out.println("This program will calculate your ideal training " +
       "heart rate.");
    System.out.println();

    // get the necessary input	 
    System.out.print("What is your age?  ");
    age = Console.in.readInt();
    System.out.print("What is your resting heart rate? (beats/min) ");
    rhr = Console.in.readInt();
    System.out.println();

    // apply thr formula
    mhr = 214 - age;
    thr = ((mhr - rhr) * 0.75) + rhr;

    // display result
    System.out.println("Your training heart is " + thr);  
  }
}

// NOTE:
// thr must be a double because 0.75 appears in the formula, which causes
// a "widening" of the values around it.  The final type resulting from this
// formula is a double because of this.