rate.java

import java.util.Scanner;

public class rate {

 public static void main(String[] args)

 {
  System.out.print("請輸入行駛的公裡數:");

  int j;
  for (j = 1;; j++) {

   Scanner cin = new Scanner(System.in);
   int a = cin.nextInt();
   if (a == 100) {
    System.out.println("100公裡的養路費為162.5元");
   } else {

    int b = a / 25;
    int c = 0;

    float d;
    switch (b) {

    case 0:
     c = a * 10;
     d = (float) (c / 10.0);

     System.out.println(a + "公裡的養路費為" + d + "元");
     break;
    case 1:
     c = 25 * 10 + (a - 25) * 15;
     d = (float) (c / 10.0);

     System.out.println(a + "公裡的養路費為" + d + "元");
     break;
    case 2:
     c = 25 * 10 + 25 * 15 + (a - 50) * 20;
     d = (float) (c / 10.0);

     System.out.println(a + "公裡的養路費為" + d + "元");
     break;
    case 3:
     c = 10 * 25 + 25 * 15 + 25 * 20 + (a - 75) * 20;
     d = (float) (c / 10.0);

     System.out.println(a + "公裡的養路費為" + d + "元");
     break;
    default:
     System.out.println("輸入值超出取值範圍,請重新輸入");
     break;
    }
   }
  }

 }

}