[英]Tricky seg fault in C
我正在尝试为我的大学任务运行一个C项目,并且我在以下代码段中的“while(current-> next!= NULL){”行中遇到了一个seg错误:
FILE* f = fileOpen("test.txt");
if (f != NULL){
functionList = fileReadToMemory(f, &graphParams);//functionList is a pointer to the first value of the linked list it creates
current = functionList;
while (current->next != NULL) {
printf("%d %d %d %s", current->red, current->green, current->blue, current->expression);//Prints value of linked list
current = current -> next;
}
}
gdb给我的错误如下:
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x000000000000003a
0x0000000100000b30 in main () at main.c:23
23 while (current->next != NULL) {
我究竟做错了什么?
提前致谢!
你需要这样做
while (current != NULL)
代替
current->next != NULL
因为列表中的最后一个元素会导致段错误。
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