在C语言中读取文件并返回指针

我有一个函数，在这个函数中返回一个指向已分配书籍的指针，数据来自一个名为book_saved.dat的文件。我可以编译这段代码，但它会给我带来垃圾，为什么

已保存的图书是一个已存在的文件

*我的原始代码中有这个结构

#include <stdio.h>
#include <stdlib.h>


book_t *book_load(){

    book_t *book;// book_t is a struct

    book = (book_t*)malloc(sizeof(book_t));

    if (book == NULL)
        exit(1);

    FILE*fp = fopen ("book_saved.dat", "rb");

    fread (book, sizeof(book_t), 1, fp);

    return book;

}

void print_book (book_t *book) {

    printf("\n");
    printf ("Book \nTitle: %s\nWriter: %s\nPublishing: %s\nYear: %d\nWeight %.1f\n", book->title, book->writer, book->publishing_house, book->year, book->weight);

}

int main (int argc, char *argv[]){

    book_t *pontaux = book_load();
    print_book (pontaux);

    free (pontaux);


    return 0;
}

---

你能提供你的写作功能吗？我做了一个相当基本的，它似乎工作正常。我建议将结构粘贴到共享头文件中，以确保使用的结构完全相同，并在十六进制编辑器中打开book_saved.dat以确保其中的格式正确

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

 typedef struct book_t {
    char title[75];
    char writer [50];
    char publishing[30];
    int year;
    float weight; // kg. 
} book_t; 

void book_make(){

    book_t *book;// book_t is a struct

    book = (book_t*)malloc(sizeof(book_t));

    if (book == NULL)
        exit(1);
    strcpy(book->title, "Harry Potter: World\'s End");
    strcpy(book->writer, "JK Rowlingbatman");
    strcpy(book->publishing, "Publisherguy inc.");
    book->year = 3000;
    book->weight = 14.6;

    FILE*fp = fopen ("book_saved.dat", "wb");

    fwrite(book, sizeof(book_t), 1, fp);

    fclose(fp);
}


book_t *book_load(){

    book_t *book;// book_t is a struct

    book = (book_t*)malloc(sizeof(book_t));

    if (book == NULL)
        exit(1);

    FILE*fp = fopen ("book_saved.dat", "rb");

    fread (book, sizeof(book_t), 1, fp);

    return book;

}

void print_book (book_t *book) { 

    printf("\n");
    printf ("Book \nTitle: %s\nWriter: %s\nPublishing: %s\nYear: %d\nWeight %.1f\n", book->title, book->writer, book->publishing, book->year, book->weight);

}

int main (int argc, char *argv[]){

    book_make();
    book_t *pontaux = book_load();
    print_book (pontaux);

    free (pontaux);


    return 0;
}

---

book_saved.dat文件来自哪里？你是用另一个程序生成的，还是用文本编辑器手动输入的？我做了一个写而不是读的程序。是book\t char指针或数组的成员？数组。typedef struct book_t{char title[75]；char writer[50]；char publishing[30]；int year；float weight；//kg.}book_t@Kay如果你把book_t的typedef放在问题中而不仅仅是一个评论，那会有帮助的。谢谢！我的书写功能出错，我在fwrite x中加了一个“&”没问题！这发生在我们最好的人身上。除了编写更多代码或切换到具有更好类型安全性的语言之外，我无法给出更多建议