public class Interest3 {
     
   /*
      This class implements a simple program that will compute the amount of 
      interest that is earned on an investment over a period of 5 years.  The 
      initial amount of the investment and the interest rate are input by the 
      user.  The value of the investment at the end of each year is output.
   */
 
   public static void main(String[] args) {
  
      double principal;  // The value of the investment.
      double rate;       // The annual interest rate.
      
      /* Get the initial investment and interest rate from the user. */
      
      TextIO.put("Enter the initial investment: ");
      principal = TextIO.getlnDouble();
      
      TextIO.putln();
      TextIO.putln("Enter the annual interest rate.");
      TextIO.put("Enter a decimal, not a percentage: ");
      rate = TextIO.getlnDouble();
      TextIO.putln();
      
      /* Simulate the investment for 5 years. */
      
      int years;  // Counts the number of years that have passed.
      
      years = 0;
      while (years < 5) {
         double interest;  // Interest for this year.
         interest = principal * rate;
         principal = principal + interest;     // Add it to principal.
         years = years + 1;    // Count the current year.
         System.out.print("The value of the investment after ");
         System.out.print(years);
         System.out.print(" years is $");
         System.out.printf("%1.2f", principal);
         System.out.println();
      } // end of while loop
                       
   } // end of main()
        
} // end of class Interest3