調試斷言失敗（file_name！= nullptr）

我是一名初學者，我正在嘗試使用庫管理系統thingy，它出現錯誤出現（Debug Assertion Failed），並且表達式爲（file_name！= nullptr ）。調試斷言失敗（file_name！= nullptr）

當我在主菜單是，當我選擇了第一個選項，這個錯誤就出來了，所以我需要幫助，感謝：

#include<stdio.h> 
#include<stdlib.h> 
#include<ctype.h> 
#include<string.h> 
#define _CRT_SECURE_NO_WARNING 

int AddNewBook(librecord); 
int Exit(); 

struct 
{ 
    int id; 
    char title; 
    char edition; 
    int year; 
    char location; 
    char price; 
    int status; 
}book; 

FILE *librecord; 

char book_id; 
char book_title; 
char book_edition; 
char book_year; 
char book_location; 
char book_price; 

char confirmation; 
int no_value; 

int main(void) 
{ 
    printf(" **   ***   ***  ********** \n"); 
    printf(" **   ****  ****  ********** \n"); 
    printf(" **   ** **  ** **  ***   \n"); 
    printf(" **   ** ** ** **  ********** \n"); 
    printf(" **   ** ** ** **   *** \n"); 
    printf(" ******* ** **** **  ********** \n"); 
    printf(" ******* **  **  **  ********** \n"); 
    printf("\n"); 
    printf(" Welcome to Library Management System \n"); 
    printf("\n"); 
    printf(" MAIN MENU \n"); 
    printf("\n"); 
    printf(" 1. Add New Book \n"); 
    printf(" 2. Edit Book Information \n"); 
    printf(" 3. Delete Book \n"); 
    printf(" 4. View Book List \n"); 
    printf(" 5. Book Check-In \n"); 
    printf(" 6. Book Check-Out \n"); 
    printf(" 7. Search \n"); 
    printf(" 8. Exit \n"); 

    int choice; 
    printf("\n Please enter a number: "); 
    scanf_s("%d", &choice); 

    switch(choice) 
    { 
    case 1: 
     system("cls"); 
     AddNewBook(librecord); 
     break; 

    case 8: 
     Exit(); 
    default: 
     printf("Wrong Input !!! Please re-enter a number!!! \n"); 
     system("pause"); 
     system("cls"); 
     main(); 
    } 

} 

int AddNewBook(FILE *librecord) 
{ 
    librecord = fopen(librecord, "ab+"); 

    printf("\n"); 
    printf(" ADD NEW BOOK \n"); 
    printf("\n"); 

    printf(" Book ID: "); 
    scanf_s(" %d", &book.id); 
    fflush(stdin); 
    strcpy(book.id, book_id); 

    printf("\n Title: "); 
    scanf_s(" %s", &book.title); 
    fflush(stdin); 
    strcpy(book.title, book_title); 

    printf("\n Edition: "); 
    scanf_s(" %s", &book.edition); 
    fflush(stdin); 
    strcpy(book.edition, book_edition); 

    printf("\n Year of Publication: "); 
    scanf_s(" %d", &book.year); 
    fflush(stdin); 
    strcpy(book.year, book_year); 

    printf("\n Shelf Location: "); 
    scanf_s(" %s", &book.location); 
    fflush(stdin); 
    strcpy(book.location, book_location); 

    printf("\n Price(RM): "); 
    scanf_s(" %s", &book.price); 
    fflush(stdin); 
    strcpy(book.price, book_price); 

    printf("Confirm? (Y/N) \n"); 
    scanf("%c", &confirmation); 
} 

int Exit() 
{ 
    exit(0); 
}

調試斷言失敗！

計劃：...發言：\的Visual Studio 2015年 \項目\ Project9 \調試\ Project9.exe文件： minkernel \ CRT顯示器\ ucrt的\ src \ appcrt \標準輸入輸出\ fopen.cpp行：30

表達式：file_name！= nullptr

有關程序如何導致斷言失敗的信息，請參閱有關斷言的Visual C++文檔。

（按重試來調試應用程序）

來源

2016-03-05 Kenn Kelentrixion

不相關，但'fflush（stdin）'是未定義的行爲。 –