// Zorah Fung, CSE 142
// Some examples of using and writing methods that return

public class ReturnExamples {
   public static void main(String[] args) {
      // We need to store the value returned by minimumDatingAge()
      // into a variable so we can use it later
      int result = minDatingAge(18);
      int result2 = minDatingAge(21);
     
      // Now we can use the variables result and result2 which store the values
      // returned by the method call.
      System.out.println("The first minimum age is: " + result);
      System.out.println("The second minimum age is: " + result2);
      
      double rounded = round2(.1289);
      System.out.println(rounded);
   }
   
   // Given an age, returns the minimum age appropriate to date
   public static int minDatingAge(int age) {
      int minAge = age / 2 + 7;
      return minAge;
   }
   
   // Given an age, returns the maximum age appropriate to date
   public static int maxDatingAge(int age) {
      return (age - 7) * 2; // Can return an expression directly
   }

   // Given a real number, returns the number rounded to two places after the decimal place
   public static double round2(double number) {
      // Example:
      // number => .1289
      // number * 100 => 12.89
      // Math.round(12.89) => 13
      // 13 / 100.0 => .13
      return Math.round(number * 100) / 100.0;
   } 
}