Java (for循环综合应用)

你的名字 2022-09-24 11:27 176阅读 0赞

**①：模拟ATM机取款业务。错误输入三次密码则取卡。错误输入3次数额则取卡。**

package Z1;
     
    import java.util.Scanner;
     
    public class Test6 {
       public static void main(String[] args) {
         Scanner input = new Scanner(System.in);
         String a = "";
         int i, j, b = 0;
         for (i = 0; i < 3; i++) {
         System.out.println("请输入您的密码:");
         a = input.next();
         if (a.equals("123")) {
         System.out.println("请输入取款金额:(金额数需是100的倍数，且≤1000元。)");
         for (j = 0; j < 3; j++) {
         b = input.nextInt();
         if (b % 100 == 0 && b <= 1000 && b > 0) {
          System.out.println("您取了"+b+"百元。\\n交易完成，请取出您的卡。");
          return;
         } else {
          if (j < 2)
           System.out.println("您输入的金额格式有误，请重新输入:(金额数需是100的倍数，且≤1000元。)");
          else
           System.out.println("错误次数过多，请取卡。");
          continue;
         }
        }
        break;
       } else {
        if (i < 2)
         System.out.println("密码错误，请重新输入密码:");
        else {
         System.out.println("密码输入错误次数过多，请取卡。");
        }
        continue;
       }
      }
     }
    }

**②：古代百钱买百鸡**

public class Test9 {
     
     public static void main(String[] args) {
      int a, b, c;
      for (a = 0; a <= 20; a++) 
       for (b = 0; b <= 50; b++) 
        for (c = 0; c <= 100; c++)
         if (a + b + c == 100 && 5 * a + 2 * b + c / 3 == 100
           && c % 3 == 0 && a > 0 && b > 0 && c > 0) 
          System.out.println("公鸡" + a + "\\t" + "母鸡" + b + "\\t"
            + "小鸡" + c + "\\t");
      }
    }

**运行结果：**

**![Center][]**

[Center]: /images/20220719/55ebc8e464c0439f8543e597abc33bc0.png