使用while循环的Java数组
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Java array using a while loop
提问by user1534779
I have to:
我必须：
- create this java array;
- loop through it using a while loop;
- terminate the program if the sum adds up to 100;
- and print the sum and the numbers that I did put into the array.
- 创建这个java数组；
- 使用 while 循环遍历它；
- 如果总和为 100，则终止程序；
- 并打印我放入数组的总和和数字。
I can't figure out how to do that, here is my code so far, any help would be appreciated.
我不知道如何做到这一点，这是我的代码到目前为止，任何帮助将不胜感激。
public class december2012 {
public static void main(String[] args) {
int sum=0;
Scanner input = new Scanner(System.in);
int i=1;
int [] array = new int[i];
while( i > array.length || sum <= 100) {
System.out.println("Write in the " + i + " number") ;
array[i]=input.nextInt();
sum=+array[i];
System.out.println("sum is " + sum);
}
}
}
回答by Pradeep Simha
How about like this, simple way of doing:
像这样，简单的做法如何：
int sum = 0;
while(true) {
//Do calculations
if(sum >= 100) {
break;
}
}
System.out.println("Sum is : " + sum);
回答by Birb
First of all, when setting
首先，在设置时
int i=1;
int [] array = new int[i];
you are creating an array with 1 slot, which index is 0. This is crucial to take note of, when you're doing this:
您正在创建一个具有 1 个插槽的数组，其索引为0. 当您执行此操作时，请务必注意：
array[i]=input.nextInt();
because, as you defined it, iis not 1, which means that your assign the 2nd index, index 1to the return value of input.nextInt().
因为，当你定义它，i不为1，这意味着你的分配第二索引，索引1到的返回值input.nextInt()。
Your while loop is also off, as i should never be bigger than the length of the array. You should use a for-loop instead, in this fasion:
您的 while 循环也已关闭，因为 i 永远不应大于数组的长度。在这种情况下，您应该改用 for 循环：
for(int i = 0; i < array.length; i++) {
array[i] = input.nextInt();
sum += array[i]
if (sum > 100) {
return;
}
}
回答by canhazbits
You need to increment the ivariable; currently its value is always 0, so you're only setting the first element in the array.
您需要增加i变量；目前它的值总是0，所以你只设置数组中的第一个元素。
回答by Ilya
int i = 0; // array starts from 0
int [] array = new int[100]; // create larger array
while(i < array.length && sum <= 100) // i should be less then length
// && instead of ||
{
System.out.println("Write in the " + i + " number") ;
array[i] = input.nextInt();
sum += array[i]; // += instead of =+
System.out.println("sum is " + sum);
i++; // increment i
}
回答by La-comadreja
public class December2012 {
public static void main(String[] args) {
int[] array = new int[100];
int sum = 0;
int i = 0;
Scanner input = new Scanner(System.in);
while (sum <= 100 && i < array.length) {
System.out.print("Write in the " + (i + 1) + "th number: ");
array[i] = input.nextInt();
sum += array[i];
i++;
}
System.out.print("You added: ");
for (Integer i : array) System.out.print(i + " ");
System.out.println("\nsum is " + sum);
}
}
