exercise3_22.java

java程序设计导论（daniel liang著） 所有偶数课后习题答案

// Exercise3_22.java: Modify Example 3.7
import javax.swing.JOptionPane;

public class Exercise3_22 {
  public static void main(String[] args) {
    double commission = 0;
    double salesAmount = 1;

    // Enter the desired commission
    String commissionString = JOptionPane.showInputDialog(
      null, "Enter the desired commission:",
      "Exercise 3_22 Input", JOptionPane.QUESTION_MESSAGE);

    // Convert string to double
    double commissionSought = Double.parseDouble(commissionString);

    for (salesAmount = 1; commission < commissionSought;
      salesAmount++) {
      // Compute commission
      if (salesAmount >= 10001)
        commission = 5000 * 0.08 + 5000 * 0.1 + (salesAmount - 10000) * 0.12;
      else if (salesAmount >= 5001)
        commission = 5000 * 0.08 + (salesAmount - 5000) * 0.10;
      else
        commission = salesAmount * 0.08;
    }

    // Display the sales amount
    System.out.println("The sales amount " + salesAmount +
      " is needed to make a commission of $" + commissionSought);

    System.exit(0);
  }
}