可能尚未在我的For循环中初始化局部变量 [英] Local variable may not have been initialized in my For loop

问题描述

尝试在用户输入6个数字的位置进行for循环。然后验证每个数字以确定它是正数。然后他们都加起来进行小计。

Trying to make a for loop where a user inputs 6 numbers. Then each number is validated to see that it is positive. Then they are all added up for a subtotal.

在我的最后一行 count + = itemPrice; 我是在 count上收到错误说本地变量可能尚未初始化。我的一个伙伴似乎也无法弄清楚原因，并想知道是什么原因。

On my last line count += itemPrice; I'm getting an error on count saying "The local variable may not have been initialized." A buddy of mine can't seem to figure out why as well and wondering what is up with that.

public static double namehere() {
double count;
for (int x = 0; x < 6; x++)
{
    Scanner input = new Scanner (System.in);
    System.out.println ("Price of Item: ");
    double itemPrice = input.nextDouble();
    while (itemPrice < 0.01)
    {
        Scanner input2 = new Scanner (System.in);
        System.out.println ("Price of Item: ");
        itemPrice = input.nextDouble();
    }
    count += itemPrice;
}

推荐答案

double count;      // not initialized

double count = 0;  // initialized

默认情况下，本地原始变量不设置为0，因此必须显式初始化它们。

Local primitive variables are not set to 0 by default, so they must be explicitly initialized.

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