数组大小导致C崩溃 [英] Array size causing C to crash

问题描述

我正在努力在C中制作大量的结构体。我需要该数组容纳超过一百万个结构体实例。但是，当数组大小超过数十万时，程序将崩溃。最初运行良好，然后崩溃。我正在运行具有7 GB RAM的Windows 7。

I am working to make a large array of structs in C. I need the array to hold over 1 million struct instances. However when the array size gets above a couple hundred thousand the program crashes. It runs fine for the first bit then it crashes. I am running Windows 7 with 6 gb of RAM.

此问题的根本原因是什么？下面是代码

What is the root cause of this problem? Below is the code

struct Job {
   unsigned long id;
   unsigned int num_preds;
   unsigned int resources;
   unsigned int* pred_array;
};

int main()
{
    //Counter and loop variables (Do not use for any other purpose)
    unsigned int i,j,k,count;
    unsigned long height,num_jobs;
    // This is our input section
    height = 1000;
    //Calculate the number of jobs
    num_jobs = (height+1)*height*0.5;
    printf("%d \n",num_jobs);

    struct Job jobs[num_jobs];
    return 0;
}

推荐答案

堆栈的大小有限。尝试使用malloc在堆上分配大型数组。

The stack has a limited size. Try allocating large arrays on the heap using malloc.

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