为什么我会中止(核心弃权)

时间:2019-04-20 11:44:47

标签: c free

我有这段代码,但我中止了(核心转储)。当我对“销毁”行发表评论时,一切都很好,所以我认为错误在那里。有什么想法吗?

#include <stdio.h>
#include <stdlib.h>
#define maxelem 100
#define NIL -1

typedef int BHItem;

struct node {
        BHItem data;
        int priority;
};

typedef struct node *BHNode;

BHNode BHCreate()               //This function creates an empty heap
{
        BHNode heap;
        int i;
        heap=malloc(maxelem*sizeof(struct node));
        for (i=0; i<maxelem; i++) {
                heap[i].data=NIL;
                heap[i].priority=NIL;
        }
}

void BHDestroy(BHNode heap)             //This function destroys a heap
{
        free(heap);
}

int main()
{
        BHNode heap;
        heap=BHCreate();
        BHDestroy(heap);        //Destroy the heap
        return 0;
}

1 个答案:

答案 0 :(得分:4)

问题在于BHCreate缺少return heap;作为最终声明。它应该看起来像这样:

BHNode BHCreate()
{
        BHNode heap;
        int i;
        heap=malloc(maxelem*sizeof(struct node));
        for (i=0; i<maxelem; i++) {
                heap[i].data=NIL;
                heap[i].priority=NIL;
        }

        return heap;
}

您应打开编译器警告以发现以下内容:

$ gcc main.c -Wall -Wextra
main.c: In function ‘BHCreate’:
main.c:26:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^