线程1收到信号SIGSEGV，分段错误

debugcn 发表于 Dev

大师

我尝试使用gdb调试代码：我收到错误提示

Thread 1 received signal SIGSEGV, Segmentation fault

这是我的代码：

typedef struct list {
    node *head;
    node *tail;
    int number_of_nodes;
} List;

typedef struct queue {
    List *ptr_list;
} Queue;

void queue_initialize(Queue *queue_list) {
    //TODO
    printf("hello inside queue_initialize\n");  
    list_initialize(queue_list->ptr_list);
    printf("hello after queue_initialize\n");
    return;
}

void list_initialize(List *ptr_list) {
    //TODO
    printf("hello in list_initialize\n");
    ptr_list->head = 0;
    printf("hello\n");
    ptr_list->tail = 0;
    printf("hello\n");
    ptr_list->number_of_nodes = 0;
    printf("hello after list_initialize\n");
}

当我调用该函数时，queue_initialize(Queue *queue_list)我得到此输出

hello before queue_initialize
hello inside queue_initialize
hello in list_initialize

但预期的输出是：

hello before queue_initialize
hello inside queue_initialize
hello in list_initialize
hello 
hello
hello after list_initialize

谁能告诉我这段代码有什么问题吗？非常感谢您的努力，请快速帮助我

我很确定这些行中的错误在这里：

ptr_list->head = 0;
ptr_list->tail = 0;
ptr_list->number_of_nodes = 0;

chqrlie

必须先分配List结构，然后才能初始化其成员：

#include <stdio.h>
#include <stdlib.h>

typedef struct list {
    node *head;
    node *tail;
    int number_of_nodes;
} List;

typedef struct queue {
    List *ptr_list;
} Queue;

void list_initialize(List *ptr_list) {
    //TODO
    printf("hello in list_initialize\n");
    if (ptr_list) {
        ptr_list->head = 0;
        printf("hello\n");
        ptr_list->tail = 0;
        printf("hello\n");
        ptr_list->number_of_nodes = 0;
    }
    printf("hello after list_initialize\n");
}

void queue_initialize(Queue *queue_list) {
    printf("hello inside queue_initialize\n"); 
    if (queue_list) {
        queue_list->ptr_list = malloc(sizeof(List));
        list_initialize(queue_list->ptr_list);
    }
    printf("hello after queue_initialize\n");
}

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