2021-12-16猜数字游戏

1.简单判断

public class A {
    public static void main(String[] args) {
        int x = 3;
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入一个数字");
        int y = scanner.nextInt();

        if (x == y) {
            System.out.println("猜对了");
        } else {
            System.out.println("猜错了");
        }
      }
   }

2.随机判断

public class A {
    public static void main(String[] args) {
        Random r = new Random();
        int x = r.nextInt(10);

        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入一个数字");
        int y = scanner.nextInt();

        if (x == y) {
            System.out.println("猜对了");
        } else {
            System.out.println("猜错了");
        }
     }
   }

3.循环猜数

public class A {
    public static void main(String[] args) {
        Random r = new Random();
        int x = r.nextInt(10);

        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请输入一个数字");
            int y = scanner.nextInt();

            if (x == y) {
                System.out.println("猜对了");
                break;
            } else {
                System.out.println("猜错了");
            }
        }
     }
   }

4.循环猜数+次数

public class A {
    public static void main(String[] args) {
        Random r = new Random();
        int x = r.nextInt(10);
        int z=0;

        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请输入一个数字");
            int y = scanner.nextInt();
            z++;

            if (x == y) {
                System.out.println("猜对了");
                break;
            } else {
                System.out.println("猜错了");
            }
        }
        System.out.println(z);
      }
   }

5.判断大小

public class A {
    public static void main(String[] args) {
        Random r = new Random();
        int x = r.nextInt(10);
        int z = 0;

        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请输入一个数字");
            int y = scanner.nextInt();
            z++;

            if (x == y) {
                System.out.println("猜对了");
                break;
            } else {
                if (y > x) {
                    System.out.println("猜大了");
                } else {
                    System.out.println("猜小了");
                }
            }
        }
        System.out.println(z);
    }
  }