Java - 在while循环中增加值
问题描述:
这只是伤害了我的大脑。 http://programmingbydoing.com/a/adding-values-in-a-loop.htmlJava - 在while循环中增加值
编写一个从用户那里获取几个整数的程序。总结他们给你的所有整数。当它们输入0时停止循环。在最后显示总数。
什么Ive得到了迄今:
Scanner keyboard = new Scanner(System.in);
System.out.println("i will add");
System.out.print("number: ");
int guess = keyboard.nextInt();
System.out.print("number: ");
int guess2 = keyboard.nextInt();
while(guess != 0 && guess2 != 0)
{
int sum = guess + guess2;
System.out.println("the total so far is " + sum);
System.out.print("number: ");
guess = keyboard.nextInt();
System.out.print("number: ");
guess2 = keyboard.nextInt();
System.out.println("the total so far is " + sum);
}
//System.out.println("the total so far is " + (guess + guess2));
}
答
声明int sum
变量while循环之外,只有一个guess = keyboard.nextInt()
内循环。将用户的猜测也添加到循环中的总和中。
然后在循环输出用户的总和。
即:
int sum;
while(guess != 0)
{
guess = keyboard.nextInt();
sum += guess;
}
System.out.println("Total: " + sum");
编辑:也去掉guess2
变量,你将不再需要它。
+0
非常感谢你:) – tamalon
答
的代码将是如下:通过做:)
int x = 0;
int sum = 0;
System.out.println("I will add up the numbers you give me.");
System.out.print("Number: ");
x = keyboard.nextInt();
while (x != 0) {
sum = x + sum;
System.out.println("The total so far is " + sum + ".");
System.out.print("Number: ");
x = keyboard.nextInt();
}
System.out.println("\nThe total is " + sum + ".");
答
编程。然后你将该数字存入总数(总数+ =数字或总数=总数+数字)。然后,如果输入的数字不是0,则执行while循环。每当用户输入一个非零数字时,该数字就被存储在总数中(总数越来越大),而while循环要求另一个数字。如果和当用户输入0时,while循环中断,程序显示总数内的值。 :D我自己是一个初学者,在弄清楚之前对逻辑有一些疑问。快乐的编码!
答
import java.util.Scanner;
public class AddingInLoop {
public static void main(String[] args) {
Scanner keyboard = new Scanner(System.in);
int number, total = 0;
System.out.print("Enter a number\n> ");
number = keyboard.nextInt();
total += number;
while (number != 0) {
System.out.print("Enter another number\n> ");
number = keyboard.nextInt();
total += number;
}
System.out.println("The total is " + total + ".");
}
}
你先提示用户输入一个数字
public static void main(String[] args) throws Exception {
Scanner keyboard = new Scanner(System.in);
int input = 0;
int total = 0;
System.out.println("Start entering the number");
while((input=keyboard.nextInt()) != 0)
{
total = input + total;
}
System.out.println("The program exist because 0 is entered and sum is "+total);
}
这里有一个实际的问题吗? –
逻辑错误.. – Kick
提示:“停止循环,当它们进入0”不同于“停止循环时,他们输入两个0”。 – ajb