为什么malloc会触发断点？

我正在写一个程序作为学校的项目，但我一直遇到 "Critical error detected c0000374 "或"...has triggered breakpoint"，我试着调试，但没有成功，我也注意到有时它会运行，但有时它会在随机的malloc上崩溃。下面是我的代码，它应该为MOVIES生成链接列表，为每部电影生成ACTORS的链接列表。我对C语言没什么经验，请大家帮忙。

typedef struct meno {
    char meno[100];
    char priezvisko[100];
}NAME;

typedef struct herec {
    struct meno meno;
    int rok_narodenia;
    struct herec *dalsi;
}ACTOR;

typedef struct film {
    char meno[100];
    struct herec *herec;
    int rok_vyroby;
    struct meno meno_rezisera;
    struct film *dalsi;
}MOVIE;

MOVIE* nacitaj() {
    FILE* file;
    int i = 1;
    file = fopen("filmy.txt", "r");
    if (file == NULL) {
        printf("SUBOR SA NEPODARILO OTVORIT");
        return NULL;
    }

    MOVIE* film = malloc(sizeof(MOVIE*));
    MOVIE* head = film;
    MOVIE* film_temp = NULL;
    ACTOR* herec = NULL;
    ACTOR* herec_temp = NULL;
    char temp,temp2;
    film->dalsi = NULL;
    while ((temp = fgetc(file)) != EOF) {
        if (temp != '*') {
            //pre film
            if (film->dalsi != NULL) {
                herec->dalsi = NULL;
                herec = NULL;
                herec_temp = NULL;
                film = film->dalsi;
                film_temp = NULL;

            }
            if(film_temp == NULL){
                film_temp = malloc(sizeof(MOVIE*));
                film->dalsi = (MOVIE*)film_temp;
            }

            film->meno[0] = temp;
            while ((temp = fgetc(file)) != '\n') {
                film->meno[i] = temp;
                i++;
            }
            i = 1;
            fscanf(file, "%d\n%s %s\n", &film->rok_vyroby, film->meno_rezisera.meno, film->meno_rezisera.priezvisko);
            herec = (ACTOR*)malloc(sizeof(ACTOR*));
            film->herec = (ACTOR*)herec;
        }
        if (temp == '*') {
            //pre herca
            if (herec != NULL && herec->dalsi != NULL) {
                herec = (ACTOR*)herec->dalsi;
                herec_temp = NULL;
            }
            if (herec_temp == NULL) {
                herec_temp = malloc(sizeof(ACTOR*));
                herec->dalsi = (ACTOR*)herec_temp;
            }
            fscanf(file, "%s %s %d\n", herec->meno.meno, herec->meno.priezvisko, &herec->rok_narodenia);
        }

    }
    film->dalsi = NULL;
    fclose(file);
    return head;
}

3
投票

malloc(sizeof(MOVIE*)); 是错误的，因为你只分配了指针大小的字节，而不是结构的大小。

然后你对结构的字段进行了反引用--所以你访问了不属于你的内存。

你需要按照结构体的要求分配尽可能多的字节。