library.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
// #include <iostream>
#define MAXNUM 256
#define MEMBER_FILE "member.txt"
#define BOOK_FILE "book.txt"
#define DATA_FILE "data.txt"

int add_book();
void remove_book();
void add_member();
void remove_member();
void member_list();
void book_list();

struct MEMBER
{
	int age;
	char member_name[10];
	char phone[20];
}members[100];
struct BOOK
{
	char book_name[50];
	int state;
}books[500];

int admin()
{
	int choice;
	printf("What function do you want?\n(1)add book\n(2)remove book\n(3)add member\n(4)remove member\n(5)member list\n(6)book list\n(7)exit\n");
	scanf("%d",&choice);
	switch(choice)
	{
		case 1:
			add_book();
			break;
		case 2:
			remove_book();
			break;
		case 3:
			add_member();
			break;
		case 4:
			remove_member();
			break;
		case 5:
			member_list();
			break;
		case 6:
			book_list();
			break;
		case 7:
			exit(0);	
	}
	return 1;
}
int add_book()
{
	char books_temp_name[50],books_temp_log[60],books;
	char line[50];
	char temp_book[20];
	int state;
	FILE *fp;
	FILE *fp2;
	fp=fopen(BOOK_FILE,"a+");
	fp2=fopen(BOOK_FILE,"r+");
	printf("now book list:\n###############\n");
	while(fgets(line,sizeof(line),fp2)!=NULL)
	{
		sscanf(line,"%s %d\n",temp_book,&state);
		if(state!=9)
		{
			printf("%s",line);
		}
	}
	printf("###############\n");
	printf("What book do you want to add?\nBook's name:");
	scanf("%s",books_temp_name);	
	sprintf(books_temp_log,"%s 1\n",books_temp_name);
	fwrite(books_temp_log,sizeof(char),strlen(books_temp_log),fp);
	printf("****Add success!****\n");
	sleep(2);
	fclose(fp);
	fclose(fp2);
	return 1;
}
void remove_book()
{
	char book[20];
	FILE *fp;
	// FILE *fp2;
	char line[50];
	char temp_book[20];
	char changeString[32];
	int state;
	if((fp=fopen(BOOK_FILE,"r+"))==NULL)
	{
		printf("No book\n");
		exit(0);
	}
	// fp2 = fopen(BOOK_FILE,"a+");
	printf("now book list:\n###############\n");
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %d\n",temp_book,&state);
		if(state!=9)
		{
			printf("%s",line);
		}
	}
	//while((books=fgetc(fp))!=EOF)
		//fputc(books,stdout);
	printf("###############\n");
	printf("What book do you want to delete?\nBook's name:");
	scanf("%s",book);
	fseek(fp,0,SEEK_SET);
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %d\n",temp_book,&state);
		if(strcmp(book,temp_book)==0)
		{
			sprintf(changeString,"%s %d\n",book,9);
			fseek(fp,-strlen(line),SEEK_CUR);
			fwrite(changeString,sizeof(char),strlen(line),fp);
		}
	}
	printf("****delete success!****\n");
	sleep(2);
	fclose(fp);
	// fclose(fp2);
}
void add_member()
{
	char members_temp_name[50],members_temp_age[10],members_temp_phone[30],members_temp_log[60],members;
	char line[50];
	char temp_name[30],temp_phone[20],temp_age[10];
	int state;
	FILE *fp;
	FILE *fp2;
	fp=fopen(MEMBER_FILE,"a+");
	fp2=fopen(MEMBER_FILE,"r+");
	printf("now member list:\n###############\n");
	while(fgets(line,sizeof(line),fp2)!=NULL)
	{
		sscanf(line,"%s %s %s %d\n",temp_name,temp_age,temp_phone,&state);
		if(state!=9)
		{
			printf("%s",line);
		}
	}
	printf("###############\n");
	printf("What member do you want to add?\nMember's name:");
	scanf("%s",members_temp_name);
	printf("Member's age:");
	scanf("%s",members_temp_age);
	printf("Member's phone:");
	scanf("%s",members_temp_phone);
	sprintf(members_temp_log,"%s %s %s %d\n",members_temp_name,members_temp_age,members_temp_phone,1);
	fwrite(members_temp_log,sizeof(char),strlen(members_temp_log),fp);
	printf("****Add success!****\n");
	sleep(2);
	fclose(fp);
	fclose(fp2);
}
void remove_member()
{
	char member[30];
	FILE *fp;
	char line[50];
	char temp_name[30],temp_phone[20],temp_age[10];
	char changeString[52];
	int state;
	if((fp=fopen(MEMBER_FILE,"r+"))==NULL)
	{
		printf("No member\n");
		exit(0);
	}	
	printf("now member list:\n###############\n");
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %s %s %d\n",temp_name,temp_age,temp_phone,&state);
		if(state!=9)
		{
			printf("%s",line);
		}
	}
	printf("###############\n");
	printf("What member do you want to delete?\nMember's name:");
	scanf("%s",member);
	fseek(fp,0,SEEK_SET);
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %s %s %d\n",temp_name,temp_age,temp_phone,&state);
		if(strcmp(member,temp_name)==0)
		{
			sprintf(changeString, "%s %s %s %d\n",temp_name,temp_age,temp_phone,9);
			fseek(fp,-strlen(line),SEEK_CUR);
			fwrite(changeString,sizeof(char),strlen(line),fp);
		}
	}
	printf("****delete success!****\n");
	sleep(2);
	fclose(fp);
}
void member_list()
{
	char members;
	char line[50];
	char temp_name[30],temp_phone[20],temp_age[10];
	int state;
	FILE *fp;
	fp=fopen(MEMBER_FILE,"r+");
	printf("now member list:\n###############\n");
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %s %s %d\n",temp_name,temp_age,temp_phone,&state);
		if(state!=9)
		{
			printf("%s",line);
		}
	}
	printf("###############\n");
	fclose(fp);
}
void book_list()
{
	char books;
	char line[50];
	char temp_book[20];
	int state;
	FILE *fp;
	fp=fopen(BOOK_FILE,"r+");
	printf("now book list:\n###############\n");
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %d\n",temp_book,&state);
		if(state!=9)
		{
			printf("%s",line);
		}
	}
	printf("###############\n");
	fclose(fp);
}

void borrow_book()
{
	char book[20];
	FILE *fp;
	char line[50];
	char temp_book[20];
	char changeString[32];
	int state;
	fp=fopen(BOOK_FILE,"r+");
	printf("now book list:\n###############\n");
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %d\n",temp_book,&state);
		if(state!=9)
		{
			printf("%s",line);
		}
	}
	printf("###############\n");
	printf("Which book do you want to borrow?\nBook's name:");
	scanf("%s",book);
	fseek(fp,0,SEEK_SET);
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %d\n",temp_book,&state);
		if(strcmp(book,temp_book)==0)
		{
			sprintf(changeString,"%s %d\n",book,0);
			fseek(fp,-strlen(line),SEEK_CUR);
			fwrite(changeString,sizeof(char),strlen(line),fp);
		}
	}
	printf("****Borrow success!****\n");
	sleep(2);
	fclose(fp);
}
void return_book()
{
	char book[20];
	FILE *fp;
	char line[50];
	char temp_book[20];
	char changeString[32];
	int state;
	fp=fopen(BOOK_FILE,"r+");
	printf("now book list:\n###############\n");
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %d\n",temp_book,&state);
		if(state!=9)
		{
			printf("%s",line);
		}
	}
	printf("###############\n");
	printf("Which book do you want to return?\nBook's name:");
	scanf("%s",book);
	fseek(fp,0,SEEK_SET);
	while(fgets(line,sizeof(line),fp)!=NULL)
	{
		sscanf(line,"%s %d\n",temp_book,&state);
		if(strcmp(book,temp_book)==0)
		{
			sprintf(changeString,"%s %d\n",book,ㄅ);
			fseek(fp,-strlen(line),SEEK_CUR);
			fwrite(changeString,sizeof(char),strlen(line),fp);
		}
	}
	printf("****Return success!****\n");
	sleep(2);
	fclose(fp);
}

int user()
{
	int choice;
	printf("What function do you want?\n(1)borrow book\n(2)return book\n(3)search book\n(4)book list\n(5)exit\n");
	scanf("%d",&choice);
	switch(choice)
	{
		case 1:
			borrow_book();
			break;
		case 2:
			return_book();
			break;
		case 3:
			search_book();
			break;
		case 4:
			book_list();
			break;
		case 5:
			exit(0);	
	}
	return 2;
}

int main()
{
	int mode;
	printf("Who are you?\n(1)admin(2)user\n");
	scanf("%d",&mode);
    while(1)
    {
		if(mode==1)
			admin();
		else if(mode==2)
			user();
		else
		{
			printf("error input !!!\n");
			break;
		}	
	}
	return 0;
}