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我正在使用 ANSI C 并得到“程序收到信号 SIGSEGV，分段错误”。当我运行它时，我的下面的代码。编译没问题。那里没有错误。

#define MAX_LINE_SIZE 1024
#define DELIMITER ","
#define TICKET_NAME_LEN 40
#define TICKET_ZONE_LEN 10

struct stock_data 
{
    char ticket_name[TICKET_NAME_LEN+1];
    char ticket_type;
    char ticket_zone[TICKET_ZONE_LEN+1];
    unsigned int ticket_price;
    unsigned int stock_level;
};

typedef struct stock_node 
{
    struct stock_data * data;
    struct stock_node * next_node;
} stock_node;

char temp_line[MAX_LINE_SIZE];
char *token;
int i, count = 0;

stock_node * snode = NULL;
struct stock_data * sdata = NULL;

FILE *stock_file = fopen( stockfile, "r" );

while (fgets(temp_line, MAX_LINE_SIZE, stock_file) != NULL) {

  token = strtok (temp_line, DELIMITER);
  count++;

  snode = (stock_node *) realloc(snode, count * sizeof(stock_node));
  if (snode == NULL) { abort(); }  

  snode->data = (struct stock_data *) malloc(sizeof(struct stock_data));
  if (snode->data == NULL) { abort(); }  

  i = 1;

 while(token != NULL) {
     switch(i) {
        case 1:
           strcpy(snode[count - 1].data->ticket_name, token);
           break;
        case 2:
           snode[count - 1].data->ticket_type = token[0];
           break;
        case 3:
           strcpy(snode[count - 1].data->ticket_zone, token);
           break;
        case 4:
           snode[count - 1].data->ticket_price = atoi(token);
           break;
        case 5:
           snode[count - 1].data->stock_level = atoi(token);
           break;                                                            
     }

     token = strtok (NULL, DELIMITER);
     i++;
  }
}

我使用gdb 工具对其进行调试，发现我收到以下行的错误：（对于其中任何一个。我尝试一一禁用它们，它们中的每一个都导致了段错误。）

strcpy（snode [count - 1].data->ticket_name, token);
snode[count - 1].data->ticket_type = token[0];
strcpy(snode[count - 1].data->ticket_zone, token);
snode[count - 1].data->ticket_price = atoi(token);
snode[count - 1].data->stock_level = atoi(token);

4

1 回答 1

5

好吧，它看起来snode[count - 1].data从未初始化。snode[0].data仅分配第一个索引

我认为你应该更换

snode->data = (struct stock_data *) malloc(sizeof(struct stock_data));
if (snode->data == NULL) { abort(); }

经过

snode[count - 1].data = (struct stock_data *) calloc(1, sizeof(struct stock_data));
if (snode[count - 1].data == NULL) { abort(); }
于 2013-11-04T12:54:28.897 回答