growth.java

Java 入门书的源码

//Copyright (c) 1998, Arthur Gittleman
//This example is provided WITHOUT ANY WARRANTY either expressed or implied.

/*  
 * Input:       Rate, a double value giving the yearly percent interest rate
 *              Balance, a double value giving the amount deposited
 *              Years, an int value giving the time period for the deposit
 *
 * Output  :    Amount, the total amount in the account at the end of the 
 *                 time period.
 */

import iopack.Io;
public class Growth {
  public static void main(String [] args) {
    double rate;        //  yearly percent interest rate 
    double balance;     //  amount on deposit
    int years;          //  time period of the deposit
    double interest;    //  interest earned in current year

    rate = Io.readDouble("Enter the percent interest rate");
    balance = Io.readDouble("Enter the initial balance");
    years = Io.readInt("Enter the time period for the deposit");
    for (int i = 1; i <= years; i++)  {
      interest = balance * rate/100;
      balance += interest;
    }
    System.out.print ("The balance after " + years + " years is ");
    Io.println$(balance);
    Io.readString("Press any key to exit");   // Added for IDE use
  }
}