問題描述

當輸入零并立即開始求和時，我需要停止詢問整數輸入.當我輸入零時，我的程序不會停止.我需要它停止并開始總結它收集的所有輸入.

I need to stop asking for integer inputs when zero is typed as an input and start summation immediately. My program doesn't stop when I type zero. I need it to stop and start summing up all the inputs it has gathered.

這是我所擁有的:

public class Inttosum {

    public static void main(String[] args) {
        System.out.println("Enter an integer");
        Scanner kb = new Scanner(System.in);
        int askool = kb.nextInt();
        int sum = 0;
        int score = 0;


        while(askool != 0){
          score = kb.nextInt();
          sum += score;
        }
    }
}

///////////////最終代碼有效..謝謝！公共類 Inttosum {

/////////////////The final code which worked..Thank you! public class Inttosum {

    public static void main(String[] args) {
        System.out.println("Enter an integer");

    Scanner kb = new Scanner(System.in);
    int sum = 0;
    int score = 0;
    do {
        score = kb.nextInt();
        sum += score;

    }while(score != 0);
    System.out.print(sum); 
 }
}

推薦答案

do-while

您正在使用稱為 askool 的東西作為循環條件，但在循環中更新變量 score.您可以使用 do-while 循環.改變

do-while

You are using something called askool as a loop condition, but updating the variable score in your loop. You could use a do-while loop. Change

while(askool != 0){
    score = kb.nextInt();
    sum += score;
}

類似

do {
    score = kb.nextInt();
    sum += score;
}while(score != 0);

使用 break

我還建議調用 Scanner.hasNextInt() 在調用 nextInt 之前.而且，由于你不使用 score(只是 sum)你可以這樣寫，

Using break

I also suggest calling Scanner.hasNextInt() before calling nextInt. And, since you don't use the score (just the sum) you could write it like,

int sum = 0;
while (kb.hasNextInt()) {
    int score = kb.nextInt();
    if (score == 0) {
        break;
    }
    sum += score;
}
System.out.print(sum);

如果用戶輸入文本，它也會停止(并且仍然 sum 所有 ints).

Which will also stop (and still sum all ints) if the user enters text.

這篇關于讀取輸入，直到輸入特定數字的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！