分配大（5000+）数组

问题描述

我上的应用程序的工作是有三种可能的大小为数据输入：

I am working on an application were there are three possible sizes for the data entered:

• 小：1000元


• 中等= 5000元


• 大= 500000元

问题是，我不能分配的大阵。看来，大小大于5000是不能接受的。

The problem is that I can't allocate the large array. It seems that a size larger than 5000 is not accepted.

我得到一个运行时错误，当我做到以下几点：

I get a run time error when I do the following:

long  size=1000;
char ch;
int arr[size];
ch=getch();

if(ch==..)
  size=...;

1000和5000尺寸看起来做工精细，但我怎样才能使500K大小的​​数组，以这种方式？

Sizes of 1000 and 5000 seem to work fine, but how can I make an array of size 500k in this way?

推荐答案

您堆栈不能容纳那么多的数据。你必须在堆上分配大数组如下：

Your stack can't hold that much data. You have to allocate big arrays on the heap as follows:

int *array = malloc (sizeof(int)*size);

由于PMG指出，记得要释放你的记忆，一旦你做了。

As pmg pointed out remember to free your memory once your done.

free(array);

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