Java while 循环在我需要的时候不工作

Question

为什么我的 output1 打印出来不像更正后的 output1？当数字按升序排列时，程序工作正常。如您所见，当他们不这样做时，它不会。请帮助，我可以使用 do while 或 while 循环。

代码：

import java.util.Scanner;

public class App1 {
public static void main(String[] args) {
    Scanner keyboard = new Scanner(System.in);


    int entry;
    int entry2;
    int entry3;

    System.out.println("Enter three integers");
    System.out.println("Side 1: ");
    entry = keyboard.nextInt();
    System.out.println("Side 2: ");
    entry2 = keyboard.nextInt();

    do {

        entry3 = 0;

        if (entry2 <= entry) {

            System.out.println(entry2 + " is smaller than " + entry + " Try again.");
            System.out.println("Side 2");
            entry2 = keyboard.nextInt();
        }

        else if (entry2 > entry) {
            System.out.println("Side 3: ");
            entry3 = keyboard.nextInt();

        }  if (entry3 <= entry2) {
            System.out.println("\nYour three sides are " + entry + " " + entry2 + " " + entry3);
            System.out.println("NO!  These sides do not make a right triangle!");
        } if (entry3 > entry2) {
            System.out.println("\nYour three sides are " + entry + " " + entry2 + " " + entry3);
            System.out.println("These sides *do* make a right triangle.  Yippy-skippy!");

        }

    } while (entry2 < entry);

}

}

我的输出：1

Enter three integers
Side 1: 
2
Side 2: 
1
1 is smaller than 2 Try again.
Side 2
2

我的输出 2：

Enter three integers
Side 1: 
1
Side 2: 
2
Side 3: 
3

Your three sides are 1 2 3
These sides *do* make a right triangle.  Yippy-skippy!

Output1 的正确输出：

Enter three integers:
Side 1: 4
Side 2: 3
3 is smaller than 4.  Try again.
Side 2: -9
-9 is smaller than 4.  Try again.
Side 2: 5
Side 3: 1
1 is smaller than 5.  Try again.
Side 3: 5

Your three sides are 4 5 5
NO!  These sides do not make a right triangle!

Answer 1

这是一种方法：

int entry;
int entry2;
int entry3;

System.out.println("Enter three integers");
System.out.println("Side 1: ");
entry = keyboard.nextInt();
System.out.println("Side 2: ");
entry2 = keyboard.nextInt();

while(entry2 <= entry) {
   System.out.println(entry2 + " is smaller than " + entry + " Try again.");
   System.out.println("Side 2");
   entry2 = keyboard.nextInt();
}
//Execution reaches beyond this point only when entry2>entry
System.out.println("Side 3: ");
entry3 = keyboard.nextInt();

if (entry3 <= entry2) {
  System.out.println("\nYour three sides are " + entry + " " + entry2 + " " + entry3);

  System.out.println("NO!  These sides do not make a right triangle!");
}
if (entry3 > entry2) {
  System.out.println("\nYour three sides are " + entry + " " + entry2 + " " + entry3);
  System.out.println("These sides *do* make a right triangle.  Yippy-skippy!");
}

Answer 2

根据你判断三角形是否正确的方法条件，完全错误。如果你是检查3边的长度，那么它应该是这样的：

import java.util.*;

public class App1 {
public static void main(String[] args) {
    Scanner keyboard = new Scanner(System.in);


    int entry;
    int entry2;
    int entry3;
    boolean check = true;

    while(check) {
    System.out.println("Enter three integers");
    System.out.println("Side 1: ");
    entry = keyboard.nextInt();
    System.out.println("Side 2: ");
    entry2 = keyboard.nextInt();
    System.out.println("Side 3: ");
    entry3 = keyboard.nextInt();

    int a = entry*entry;
    int b = entry1*entry1;
    int c = entry2*entry2;

    if((a == b + c) || (b == a + c ) || (c == a + b) {
        System.out.println("The Triangle is right.");
        check = false;
    }

    else
    System.out.println("The Triangle is not right. Please try Again!!!");    
    }
    }

}

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