Question

为什么当我尝试在第二次提示之后放置Z=input.nextInt();时它不起作用但是当我把它放在第二个for循环时它起作用。

import java.util.Scanner;
public class FaresMarwan_150086 {

    public static void main(String[] args) {
     // create Scanner to obtain input from command window
      Scanner input = new Scanner(System.in);

      int M;// The normal dose entered by the user
      int endValue;// The value that stops the loop
      int sum;// sum of experiments entered by the user
      int Z;

    double percentage;// percentage of bad experiments
    double warn = 0;// initialize rule violation
    double exp = 0;// initialize experiment
    System.out.print("Please, insert the normal dose in ml: "); // prompt 
    M= input.nextInt(); // read M from the user
    System.out.println("Please, insert the set of experiments (3 integers per line, stop by 0 0 0): ");// prompt

    for(endValue=0; endValue==0;) // loop till endValue is 0
    {
        // initialization phase
        sum=0; // initialize sum
        for(int count = 0; count<=2; count++) //loop 3 times
        { 
            Z=input.nextInt(); //read z from user
            sum=sum+Z; // Sum is sum plus Z

            if(sum==0) // if the sum becomes 0
            {
                endValue++; // Increment endValue by 1
            }// end if
        }// end for
        if(sum!=0) //if the sum is not 0
        {
            exp++; // Increment exp by 1
        }

        if(sum>M) // if sum is bigger that M
        {  
            warn++; // Increment warn by 1             
        }
        if(exp==0) // if exp is 0
        {
        exp++; // Increment exp by 1
        }// end if
    }// end for
    // termination phase
    percentage =  (warn/exp)*100; // divide warn on exp and multiply that by 100
    System.out.printf("The percentage of bad experiments is %.2f%%  .\n" ,percentage);
    }// end main method 
  }// end class FaresMarwan_150086

Answer 1

input.nextInt（）;只接受一个int

根据您的评论，您似乎要求用户一次输入3个号码，例如空格，例如1 2 3

如果在for循环之前放置input.nextInt（），则Z = 1

但是当你将input.nextInt（）放在for循环中时，它将获取你输入的3个整数，因为你调用了input.nextInt（）3次。

我需要知道为什么每次我把Z = input.nextInt（）;在第二次提示之后它不起作用

1 个答案: