fpI不知道为什么会出现seg fault,我正确地关闭文件,保持在循环的链表中,但是当它到达for循环或while fgets循环(这两个循环之一)时,它会出现seg fault。我有一个非常相似的函数,工作得很好,我从中修改了这个,但是它不会产生相同的输出

static int wordMode(struct node *head, char* word)
{
    struct node *ptr;
    int count = 0;
    char* filecheck;
    char* tester;
    ptr = head;

    //print the lines
    for (ptr = head; ptr != NULL; ptr = ptr->next){
        if ( strcmp(ptr->fileName, filecheck) != 0 ) {
            filecheck = ptr->fileName;
            printf("=====================%s\n", filecheck);

            //if new file, open it and start printing
             FILE *fp = fopen(ptr->fileName, "r");
                char line [ 1024 ]; /* or other suitable maximum line size */
                int counter = 1;
                while ( fgets ( line, sizeof line, fp ) != NULL ) /* read a line */{
                     //check if the line number is in the linked list, if so add match
                     printf(" %d: %s", counter, line); /* write the line */
                     counter++;
                  }
                  fclose ( fp );
        }
        else{
            continue;
        }
    }
}

最佳答案

变量filecheck尚未初始化。

char* filecheck;
....

    if ( strcmp(ptr->fileName, filecheck) != 0 ) {

它需要被设置成一些东西。
char* filecheck = "";

关于c - 从链接列表(C)打印值段错误,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/28617390/

10-09 08:38