运行我的尝试程序时,我一直收到错误。
a.out:malloc.c:2372:sysmalloc:断言`(old_top ==(((mbinptr)(((char *)&((av) - > bins [((1) - 1) * 2])) - __builtin_offsetof(struct malloc_chunk,fd))))&& old_size == 0)|| ((unsigned long)(old_size)> =(unsigned long)(((__ builtin_offsetof(struct malloc_chunk,fd_nextsize))+((2 *(sizeof(size_t))) - 1))&〜((2 * (sizeof(size_t))) - 1)))&&((old_top) - > size& 0x1)&&((unsigned long)old_end& pagemask)== 0)'失败。
我的代码是:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct nodeData
{
char ch; /* This structure looks like a linked list */
struct nodeData *next;
}node;
typedef struct tries
{
node *start[26];
}tries;
tries *makeAllNull(tries *root)
{
int i=0;
for(i=0;i<=26;i++)
{
root->start[i] = NULL;
}
return root;
}
/* Insert the given string in to the tries */
tries *insert(tries *root,char *str,int len)
{
int i=0;
tries *temp;
temp = (tries *)malloc(sizeof(tries));
while(i<len)
{
int k = str[i] - 'a';
temp->start[k] = (node *)malloc(sizeof(struct nodeData));
temp->start[k]->ch = str[i];
temp->start[k]->next = NULL;
if(temp->start[k] == NULL)
{
root->start[k] = temp->start[k];
}
else{
root->start[k]->next = temp->start[k];
}
i++;
}
return root;
}
int main()
{
int i=0;
tries *root;
root = (tries *)malloc(sizeof(node *));
makeAllNull(root);
char str[30];
while(i<5)
{
scanf("%s",str);
root = insert(root,str,strlen(str));
}
return 0;
}
答案 0 :(得分:0)
if(temp->start[k] == NULL)
之后malloc
几乎总是错误的,导致此行显示取消引用NULL
root->start[k]->next = temp->start[k];
这会破坏记忆。
您的意思是if(root->start[k] == NULL)
而不是if(temp->start[k] == NULL)
吗?