Question

我试图将输入数量限制为大于0和整数。

代码在这里：

import java.util.Scanner;

public class PROB4_CHAL1   // Sum of Numbers
{
public static void main(String[] args)
{

 int sum = 0;
 int count = 1;
 int number = 1;

 Scanner input = new Scanner(System.in);

 System.out.println("Enter an integer " + 
              "greater than 0.");
 number = input.nextInt();

 while (number >= count) 
 {
  sum += count;
  count ++;
 }

 System.out.println("Sum equals " + sum);


}
}

Java新手，所以一切都会有所帮助！

Answer 1

您可以在while循环中获取输入，如下所示：

int number = 0; // start at 0 so the while loop is true for the first time

while (number < 1) {

    System.out.println("Enter an integer " + 
                       "greater than 0.");
    number = input.nextInt();
}

这样它会一直要求他们输入一个数字，直到他们输入的数字大于0。

向整数添加约束

1 个答案: