Question

我一直试图弄清楚我的代码几个小时，我知道这可能很简单，但我真的很感激一些帮助！

这是我的问题：



// Purpose: This program will prompt the user to enter a positive integer.
// The program will accept integers until the user enters a -1.
// Once the -1 is entered, the program will display the integers followed
// by their sum.

import java.util.Scanner;

public class InputSum
{
public static void main(String[] args)
{

Scanner scan = new Scanner(System.in);

// variable declaration
int inputNumber;
int stringNumber = 0;
int num = 0;
int sum = 0;

// prompt user to enter an integer
System.out.print("Enter a positive integer: ");
inputNumber = scan.nextInt();

// continue to have user enter integers until:
while (inputNumber >= 0)
{
sum += inputNumber;
stringNumber = inputNumber++;
System.out.print("\n Enter another positive integer (enter -1 to quit): ");
inputNumber = scan.nextInt();
// -1 is entered
if (inputNumber == -1)
{
break;
}
}
// display results
System.out.print("\n The integers you entered were: " + Integer.toString(stringNumber));
System.out.print("\n The sum of the intergers are: " + sum);



}
}

// Purpose: This program will prompt the user to enter a positive integer. // The program will accept integers until the user enters a -1. // Once the -1 is entered, the program will display the integers followed // by their sum. import java.util.Scanner; public class InputSum { public static void main(String[] args) { Scanner scan = new Scanner(System.in); // variable declaration int inputNumber; int stringNumber = 0; int num = 0; int sum = 0; // prompt user to enter an integer System.out.print("Enter a positive integer: "); inputNumber = scan.nextInt(); // continue to have user enter integers until: while (inputNumber >= 0) { sum += inputNumber; stringNumber = inputNumber++; System.out.print("\n Enter another positive integer (enter -1 to quit): "); inputNumber = scan.nextInt(); // -1 is entered if (inputNumber == -1) { break; } } // display results System.out.print("\n The integers you entered were: " + Integer.toString(stringNumber)); System.out.print("\n The sum of the intergers are: " + sum); } }

现在我的结果正确地显示了我的总和，但是它应该显示我在用逗号分隔的行中输入的整数。（EX：如果用户输入1,1,1我的结果应该是你输入的整数：1,1,1整数的总和是：3）。现在它将我输入的整数添加到sentinel值并将结果显示为：您输入的整数是：1。

我真的坚持如何做到这一点。有什么建议？谢谢！

Answer 1

您只打印输入的最后一个号码：

System.out.print("\n The integers you entered were: " + Integer.toString(stringNumber));

如果您想打印所有输入数字，则必须将它们存储在某处。

如果您希望将其存储在stringNumber中，请将其类型更改为StringBuilder，并将每个数字附加到其中。

StringBuilder stringNumber = new StringBuilder();
...
stringNumber.append(inputNumber);
stringNumber.append(", ");
...
System.out.print("\n The integers you entered were: " + stringNumber.toString());

您必须对此代码稍作调整，以避免打印额外的＆＃34;，＆＃34;在最后一个号码之后。

Answer 2

您每次都必须存储输入。

替换

stringNumber = inputNumber++;

通过

stringNumber += inputNumber+", ";

这会将输入存储在inputNumber。

中

更改

System.out.print("\n The integers you entered were: " + Integer.toString(stringNumber));

到

System.out.print("\n The integers you entered were: " + stringNumber);

这将显示输入的所有输入。

哨兵价值并显示我的结果

2 个答案: