c++ - strtok 读取文件时出现段错误

Question

在 strtok 上出现段错误，我将输入字符串 lyne 定义为 char 数组而不是指针，但似乎不起作用。这是 C 和 Linux 中的

    typedef struct 
    {
    int x;
    char *y;
    } child;

    typedef struct{
    child *details;
    }  parent;


        fp = fopen(filename,"r"); // read mode
        char lyne[25];
        char *item;
    fgets(lyne,25,fp);  

    parent record;
        record.details= malloc (5  * sizeof(child));    

        while (fgets(lyne,25,fp)) {

            printf("test %s \n",lyne);

            item = strtok(lyne," ");    

strcpy(record.details->y,item);//seg error on this line
        }
        fclose(fp);


my file looks like this
file#1
ABC 100
BCE 200


OUTPUT:
test ABC 100

Segmentation fault

Answer 1

您尚未将内存分配给结构子成员“y”，因为您的结构是

typedef struct 
    {
    int x;
    char *y;
    } child;

你要做的是:

record.details->y = malloc(sizeof(char)*(strlen(item) + 1));
strcpy(record.details->y,item);