Question

    int[] binArray = new int[100];
    int bins = 10; 
    int numOfIterations = 100/bins;
    int binElement = 0;
    for (int i=0; i<numOfIterations; i++) {
        binElement = binElement + bins;
        binElement = binArray[i];
        System.out.println(binArray[i]);
    }

继续打印： 0 0 0 0 0 0 0 0 0 0

尝试打印：0,10,20,30,40,50,60,70,80,90,100

Answer 1

您的问题是对如何为数组指定值的误解

/* Commented below is your code with comments of what the code is doing */
//sets bin element to 10.
binElement = binElement + bins;
// binArray[i] is zero (by default), so all you do is set binElement back to zero.
binElement = binArray[i];
// You still have not updated the array so it prints the default int array value of zero.
System.out.println(binArray[i]);

将您的代码更改为下面发布的代码，该代码正确地将值分配给数组，并解决您的问题：）

int[] binArray = new int[100];
int bins = 10; 
int numOfIterations = 100/bins;
int binElement = 0;
for (int i=0; i<numOfIterations; i++) {
    binElement = binElement + bins;
    binArray[i] = binElement ;
    System.out.println(binArray[i]);
}

请查看下面发布的链接，了解有关如何为数组指定值的大量示例。

Arrays

Answer 2

因为binArray被初始化为0，所以你永远不会写任何东西。

点击这一行：binElement = binArray[i];说出来：binArray[i] = binElement;它会起作用。

Answer 3

您必须为binArray的元素指定值。在for循环中执行此操作：

binElement[i] = binElement;

不是这个

binElement = binElement[i];

Answer 4

将binElement = binElement[i]更改为binElement[i] = binElement;同时将bins值更改为0.然后只会打印0,10..这样的内容。否则它会像这样打印10,20,...。

int[] binArray = new int[100];
int bins = 10; 
int numOfIterations = 100/bins;
int binElement = 0;
bins = 0;  // To print from 0
for (int i=0; i<numOfIterations; i++) {
    binElement = binElement + bins;
    binArray[i] = binElement ;
    System.out.println(binArray[i]);
}

无法理解为什么这段小代码不起作用

4 个答案: