c - strtok 分配给数组结构失败

Question

我有这个函数，但不起作用，在 ubuntu 中，当我调用该函数时，向我显示段错误(核心转储):

void loadSavedGame(char fileName[], struct saveGame *savedGamesReaded[], int *length, int *statusCode){

    char line[500];
    char *token2;
    int x=0;

    *savedGamesReaded = (struct saveGame*)malloc((*length)*sizeof(struct saveGame)); //reserve memory for pointer and array elements

    int j;
    for(j=0; j<*length; j++){
        (*savedGamesReaded)[j].id = (char *)malloc(MAX_STRING*sizeof(char)); 
        (*savedGamesReaded)[j].score = (char *)malloc(MAX_STRING*sizeof(char));
        (*savedGamesReaded)[j].position = (char *)malloc(MAX_STRING*sizeof(char));
        (*savedGamesReaded)[j].maze_level = (char *)malloc(MAX_STRING*sizeof(char));
        (*savedGamesReaded)[j].achievements = (char *)malloc(MAX_STRING*sizeof(char));
        (*savedGamesReaded)[j].time_playing = (char *)malloc(MAX_STRING*sizeof(char));
        (*savedGamesReaded)[j].virtual_players = (char *)malloc(MAX_STRING*sizeof(char));
    }


    while (feof(file) == 0){ //file its a text plane was opened before
        fgets(line,500,file);
        token2 = strtok(line,":");    // Here the program falls on the fourth loop 
        strcpy((*savedGamesReaded)[x].id, token2);
        token2 = strtok(NULL,":");
        strcpy((*savedGamesReaded)[x].score, token2);
        token2 = strtok(NULL,":");
        strcpy((*savedGamesReaded)[x].position, token2);
        token2 = strtok(NULL,":");
        strcpy((*savedGamesReaded)[x].maze_level, token2);
        token2 = strtok(NULL,":");
        strcpy((*savedGamesReaded)[x].achievements, token2);
        token2 = strtok(NULL,":");
        strcpy((*savedGamesReaded)[x].time_playing, token2);
        token2 = strtok(NULL,":");
        strcpy((*savedGamesReaded)[x].virtual_players, token2);
        x++;
    }
    fclose(archivo);


}

我这样声明结构:

struct saveGame{
   char *id;
   char *score;
   char *position;
   char *maze_level;
   char *achievements;
   char *time_playing;
   char *virtual_players;
};

我认为 strtok 不起作用，但我不知道为什么，也许 token 中的 NULL 是错误的？

strcpy((*savedGamesReaded)[x].id, token2);
token2 = strtok(NULL,":");

Answer 1

这行代码的作用与您想象的不同:

while (feof(file) == 0){ //file its a text plane was opened before

feof() 仅在达到 EOF 后返回 true。请参阅Why is “while ( !feof (file) )” always wrong?

并且您从不检查此行是否成功:

fgets(line,500,file);

此外，您不关闭文件:

fclose(archivo);