Question

来自Deitel＆＃34; Java How To Program＆＃34;第10版：

2.24（最大和最小整数）编写一个读取五个整数的应用程序并确定并打印最大和最小的整数集团中的整数。仅使用您学到的编程技巧在本章中。

我的代码：

// Ex. 2.24: LargestAndSmallestIntegers.java
// Obtain five numbers from the user, display largest and smallest from the group.
import java.util.Scanner;

public class LargestAndSmallestIntegers
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        int number1, 
            number2, 
            number3, 
            number4, 
            number5,
            largest,
            smallest;

        System.out.print("Enter first integer: ");
        number1 = input.nextInt();

        System.out.print("Enter second integer: ");
        number2 = input.nextInt();

        System.out.print("Enter third integer: ");
        number3 = input.nextInt();

        System.out.print("Enter fourth integer: ");
        number4 = input.nextInt();

        System.out.print("Enter fifth integer: ");
        number5 = input.nextInt();

        largest = number1;
        smallest = number1;

        if (number2 > largest)
            largest = number2;
        if (number3 > largest)
            largest = number3;
        if (number4 > largest)
            largest = number4;
        if (number5 > largest)
            largest = number5;

        if (number2 < smallest)
            largest = number2;
        if (number3 < smallest)
            largest = number3;
        if (number4 < smallest)
            largest = number4;
        if (number5 < smallest)
            largest = number5;

        System.out.printf("Largest of five integers is %d, and smallest is %d%n", largest, smallest);
    }
}

我做错了什么？为什么它不能获得最大和最小的整数？

Answer 1

在第二个区块中，您使用smallest进行核对，然后分配到largest。

Answer 2

我猜复制粘贴拼写错误。对于最小的部分计算，将所有从最大值到最小值的值替换为从列表中获取的最大值，并用剩余条件中的最小值覆盖。

    largest = number1;
    smallest = number1;

    if (number2 > largest)
        largest = number2;
    if (number3 > largest)
        largest = number3;
    if (number4 > largest)
        largest = number4;
    if (number5 > largest)
        largest = number5;

    // Error here 
    // fixed typos
    if (number2 < smallest)
        smallest = number2;
    if (number3 < smallest)
        smallest = number3;
    if (number4 < smallest)
        smallest = number4;
    if (number5 < smallest)
        smallest = number5;

Answer 3

    if ( two > largest ){
        largest = two;
        System.out.printf ( "Largest of five values is %d, and the smallest is %d%n", largest, smallest );
    }
    else if ( three > largest ){
        largest = three;
        System.out.printf ( "Largest of five values is %d, and the smallest is %d%n", largest, smallest );
    }
    else if ( four > largest ){
        largest = four;
        System.out.printf ( "Largest of five values is %d, and the smallest is %d%n", largest, smallest );
    }
    else if ( five > largest ){    
        largest = five;
        System.out.printf ( "Largest of five values is %d, and the smallest is %d%n", largest, smallest );
    }


    if ( two < smallest ){
        smallest = two;
        System.out.printf ( "Largest of five values is %d, and the smallest is %d%n", largest, smallest );
    }
    else if ( three < smallest ){
        smallest = three;
        System.out.printf ( "Largest of five values is %d, and the smallest is %d%n", largest, smallest );
    }
    else if ( four < smallest ){
        smallest = four;
        System.out.printf ( "Largest of five values is %d, and the smallest is %d%n", largest, smallest );
    }
    else if ( five < smallest ){    
        smallest = five;
        System.out.printf ( "Largest of five values is %d, and the smallest is %d%n", largest, smallest );
    }

Answer 4

import java.util.*;

public class LargestSmallest {
    public static void main(String[] args) {
        // Declare class variables
        int counter = 0;
        int number = 0;
        int largest = 0;
        int smallest = 0;

        while (counter < 5) {
            counter++;
            System.out.println("Enter the number");
            Scanner sc=new Scanner(System.in);
            number = sc.nextInt();

            if (number > largest) {
                largest = number;
            } else if (number < largest) {
                smallest = number;
            }

            // Display Largest and Smallest
            System.out.println("largest number is: " + largest);
            System.out.println("smallest number is: " + smallest);
        }
    }
}

最大和最小的整数 - 来自Deitel的Java书籍

4 个答案: