main file

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

FILE* open_file(const char* argv[]);

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

    if (argc == 1){
        error_code(2);
    } else{
        FILE* data_base = open_file(argv[argc-1]);
        for (int i=1; i<(argc-1);++i) // Processing of parameters
    }
    return 0;
}


void command_getter_library(){
    printf("Please enter the command\n");
    char* string = dynsting('/n');
    if (!strcmp(string,"add_book")){add_book();command_getter_library();}
    else if (!strcmp(string,"del_book")){del_book();command_getter_library();}
    else if (!strcmp(string,"get_book")){get_book();command_getter_library();}
    else if (!strcmp(string,"bring_book")){bring_book();command_getter_library();}
    else if (!strcmp(string,"list_books")){list_books();command_getter_library();}
    else if (!strcmp(string,"change_count_book_isbn")){change_count_book_isbn();command_getter_library();}
    else if (!strcmp(string,"backup_library")){backup_library();command_getter_library();}
    else if (!strcmp(string,"open_backup_library")){open_backup_library();command_getter_library();}
    else if (!strcmp(string,"exit_library_db")){exit_library_db();}
    else {error_code(20);}
}

void command_getter_student(){
    printf("Please enter the command\n");
    char* string = dynsting('/n');
    if (!strcmp(string,"add_student")){add_student();command_getter_student();}
    else if (!strcmp(string,"del_student")){del_student();command_getter_student();}
    else if (!strcmp(string,"find_student")){find_student();command_getter_student();}
    else if (!strcmp(string,"find_students_by_surname")){find_students_by_surname();command_getter_student();}
    else if (!strcmp(string,"list_students")){list_students();command_getter_student();}
    else if (!strcmp(string,"change_count_book_isbn")){change_count_book_isbn();command_getter_student();}
    else if (!strcmp(string,"backup_student")){backup_student();command_getter_student();}
    else if (!strcmp(string,"open_backup_student")){open_backup_student();command_getter_student();}
    else if (!strcmp(string,"exit_student_db")){exit_student_db();}
    else {error_code(20);}
}



void help() {
    printf("*Commands for library database*\n");
    printf("_________________________________________________________________\n");
    printf("add_book                                   Add book to library\n"); 
    printf("del_book                                   Delete book from library\n");
    printf("get_book                                   Get book from library and adds book to student\n");
    printf("bring_book                                 Adds count of book to library and delete book from student\n");
    printf("list_books                                 Shows all books in library\n"); // sorted ny ISBN
    printf("change_count_book_isbn                     Change count of book to library by ISBN \n");
    printf("backup_library                             Save the data of library in backup file\n");
    printf("open_backup_library                        Open backup version of library\n");
    printf("exit_library_db                            Save and close file of library\n\n");
    printf("----------Example for initializing programme--------\n");
    printf("Project_database your_file.csv \n");
    printf("----------Example for initializing programme--------\n\n");
    printf("_________________________________________________________________");
    
    
    printf("*Commands for student database*\n");
    printf("_________________________________________________________________\n");
    printf("add_student                                Add student to database\n"); 
    printf("del_student                                Delete student from database\n");
    printf("find_student                               Get student from database by number\n");
    printf("find_students_by_surname                   Get student from database by surname\n");
    printf("list_students                              Shows all students in database\n"); // sorted ny number
    printf("edit_student                               Change count of book to library by ISBN \n");
    printf("backup_student                             Save the data of students database in backup file\n");
    printf("open_backup_student                        Open backup version of students database\n");
    printf("exit_student_db                            Save and close file of student database\n\n");
    printf("----------Example for initializing programme--------\n");
    printf("Project_database your_file.csv \n");
    printf("----------Example for initializing programme--------\n\n");
    printf("_________________________________________________________________");
};


void error_code (int a){

    switch  (a) {
        case  1: printf("ERROR: File not be opened\n"); exit(0);
        case  2: printf("ERROR: File not indicated\n"); help(); exit(0);
        case  3: printf("ERROR: Logger error\n"); exit(0);
        case  4: printf("ERROR: Wrong login or password\n"); exit(0);
        case  5: printf("ERROR: File not be opened\n"); exit(0);
        case  6: printf("ERROR: Can't add the book\n"); exit(0);
        case  7: printf("ERROR: Can't delete the book\n"); exit(0);
        case  8: printf("ERROR: Can't get the book\n"); exit(0);
        case  9: printf("ERROR: Can't bring the book\n"); exit(0);
        case 10: printf("ERROR: Can't change count of book \n"); exit(0);
        case 11: printf("ERROR: Can't create backup the library database \n"); exit(0);
        case 12: printf("ERROR: Can't open backup of library\n"); exit(0);
        case 13: printf("ERROR: Can't add the student\n"); exit(0);
        case 14: printf("ERROR: Can't delete the student\n"); exit(0);
        case 15: printf("ERROR: Can't find student by number\n"); exit(0);
        case 16: printf("ERROR: Can't find students by surname\n"); exit(0);
        case 17: printf("ERROR: Can't edit the student \n"); exit(0);
        case 18: printf("ERROR: Can't backup the students database \n"); exit(0);
        case 19: printf("ERROR: Can't open backup of students database \n"); exit(0);
        case 21: printf("ERROR: Enter wrong command\n"); exit(0);
    }
}

FILE* open_file(const char* argv[]){
    FILE* file_thread;
    if ((file_thread = (argv[0],"r");)==NULL) {
        error_code(1);
    }
}