我使用 ANSI C 并收到“程序收到信号 SIGSEGV,段错误”。当我运行下面的代码时。编译没问题。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工具来调试它,我发现我收到以下几行的错误:(对于其中的任何一行。我尝试逐一禁用它们,每个都导致段错误。)
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);
最佳答案
嗯,看起来snode[count - 1].data
从未初始化过。仅分配第一个索引snode[0].data
我认为你应该更换
snode->data = (struct stock_data *) malloc(sizeof(struct stock_data));
if (snode->data == NULL) { abort(); }
由
snode[count - 1].data = (struct stock_data *) calloc(1, sizeof(struct stock_data));
if (snode[count - 1].data == NULL) { abort(); }
关于c - ANSI C - 程序接收信号 SIGSEGV,段错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19767960/