dogrowth.java

来自「Java 入门书的源码」· Java 代码 · 共 40 行

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

/*                 Enhances Example 4.5 to ask if the user wants to
 *                 repeat the calculation
 * 
 * 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
 *                 Repeat, 1 to repeat, 0 to quit 
 *
 * Output:         Amount, the total amount in the account at the end of the 
 *                     time period.
 */

import iopack.Io;
public class DoGrowth {
  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
    int repeat;          // 1 to repeat, 0 to quit
                     
    do {
      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);
      repeat = Io.readInt("Enter 1 to repeat, 0 to quit");
    } while (repeat == 1);
    Io.readString("Press any key to exit");   // Added for IDE use
  }
}