java - 彩票 - 猜正确的数字

Question

Scanner input = new Scanner(System.in);
Random random = new Random();
System.out.print("Enter a number u wish(1-1000): ");
int unos = input.nextInt();
int rand = random.nextInt(1000) + 1;
System.out.println(rand);
if (unos = random) {
    System.out.printf("Congratz u won");
}
while (unos < rand) {
    System.out.println("Your number is lower \t Try again: ");
    unos = input.nextInt();
}
while (unos > rand) {
    System.out.println("Your number is higher\t Try again: ");
    unos = input.nextInt();
}

因此，如果我击中的数字不等于随机生成的数字，它会起作用，但一旦我击中，它就不会输出“Congratz u won”。它就这样终止了。为什么？

import java.util.Scanner;
import java.util.Random;

public class Lutrija {

    public static void main(String []args){
        Scanner input = new Scanner(System.in);
        Random random = new Random();
        System.out.print("Uneti broj koji mislite da ce ispasti(1-1000): ");
        int unos=input.nextInt();
        int rand =random.nextInt(1000)+1;
        System.out.println(rand);
        while (unos!=rand){
            if(unos==rand){
                System.out.println("Congratz");
            }
            else if (unos>rand){
                System.out.println("broj je veci od izvucenog");
                unos=input.nextInt();
            }
            else if (unos<rand){
                System.out.println("broj je manji od izvucenog");
                unos=input.nextInt();
            }
        }
    }
}

这不起作用，为什么？

Answer 1

您在 if 语句中使用赋值 = 而不是相等测试 ==。更改为:

while ((unos = input.nextInt()) != rand) {
   // Tell them higher of lower
   // No need to call input.nextInt() in loop body as it is called
   //  when reevaluating while condition
}
// Congratulate them since to get here, unos == rand

您还应该将代码包含在一个循环中，该循环将循环直到猜测等于随机数，否则它就会终止，因为任何 while 条件都不成立。