Can anybody help me? I am stuck in a c program

[Aroona]

I have given an assignment of c to write a program that manages the library records using file handling. I have created almost four modules (Entry, Reporting/Reading, Searching, Modifying). When I execute my program, it works fine with one record but when I enter more than one record and want to read all of them, it only shows me the last record. It doesn't show me all the records.I have made a lot of changes, I put getch(); at the end of reporting loop, I opened the file in "rb+" mode(before it was opened in "rb" mode)

Also there is a problem with searching and modification that it does not recognize my file. it display message no record found.

Tell me if anybody can help me in this problem.

[LB]

I am stuck in a c program

Tell Tron to get you back out!

On a serious note, we can't help you unless you give us something to work with.

[Aroona]

Here is my program

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
struct Regestration
{
	char name[30], f_name[30];
	char NIC[15];
	char b_name[100];
	long int  b_no;
	char i_date[10], r_date[10];
}reg;
struct Book
{
	char book_name[100];
	long b_id;
}bk;

void main()
{
	void Enter(void);
	void Report(void);
	void Search(void);
	void Modify(void);
	void Delete(void);
	void invalid(void);
	char choice;
	while(1)
	{
		clrscr();
		gotoxy(18,6);
		printf("************ WELCOME TO MAIN MENU ************");
		gotoxy(27,9);
		printf("For ENTRY Menu, Press E");
		gotoxy(27,11);
		printf("For REPORTING Menu, Press R");
		gotoxy(27,13);
		printf("For SEARCHING Menu, Press S");
		gotoxy(27,15);
		printf("For MODIFICATION Menu, Press M");
		gotoxy(27,17);
		printf("For DELETION Menu, Press D");
		gotoxy(27,19);
		printf("Please Enter Your Choice: [ ]");
		gotoxy(54,19);
		choice = getche();
		if(choice == 'E' || choice == 'e')
			Enter();
		else if(choice == 'R' || choice == 'r')
			Report();
		else if(choice == 'S' || choice == 's')
			Search();
		else if(choice == 'M' || choice == 'm')
			Modify();
		else if(choice == 'D' || choice == 'd')
			Delete();
		else if(choice == 'X' || choice == 'x')
			exit(0);
		else
			invalid();
	}
	getch();
}
void invalid(void)
{
clrscr();
gotoxy(15,5);
printf("You Have Entered An Invalid Character");
gotoxy(15,7);
printf("Press Any Key To Go Back To The Main Menu");
getch();
}
void Enter(void)
{
	char choice;
	clrscr();
	gotoxy(6,3);
	printf("If You Want To Enter Records In Book Register, Press B");
	gotoxy(6,5);
	printf("And If You Want To Enter Records In Personal Info Register, Press P");
	gotoxy(6, 7);
	printf("Please Enter Your Choice: [ ]");
	gotoxy(33,7);
	choice = getche();
	if(choice == 'B' || choice == 'b')
	{
		clrscr();
		FILE *fbook;
		fbook = fopen("Book","ab");
		if(fbook==NULL)
		printf("Could Not Open");
		int j=1;
		for(int i=1;i<=3;i++)
		{
			gotoxy(20,j);
			printf("Enter Book Name: ");
			fflush(stdin);
			gets(bk.book_name);
			fflush(stdin);
			j=j+1;
			gotoxy(20,j);
			printf("Enter Book ID Or Call Number: ");
			scanf("%d", &bk.b_id);
			j=j+1;
		}
		fwrite(&bk,sizeof(bk),1,fbook);
		fclose(fbook);
	}
	else if(choice == 'P' || choice == 'p')
	{
		clrscr();
		int i,j=3;
		FILE *freg;
		freg = fopen("Library","ab");
		if(freg==NULL)
		printf("Could Not Open");
		gotoxy(25,3);
		for(i=1;i<=3;i++)
		{
			clrscr();
			gotoxy(27,2);
			printf("Enter The Name: ");
			fflush(stdin);
			gets(reg.name);
			fflush(stdin);
			gotoxy(27,j);
			printf("Enter Father's Name: ");
			fflush(stdin);
			gets(reg.f_name);
			fflush(stdin);
			gotoxy(27,j+1);
			printf("Enter National Identity Card Number: ");
			fflush(stdin);
			gets(reg.NIC);
			fflush(stdin);
			gotoxy(27,j+2);
			printf("Enter Book Name: ");
			fflush(stdin);
			gets(reg.b_name);
			fflush(stdin);
			gotoxy(27,j+3);
			printf("Enter Book ID or Call No: ");
			scanf("%d", &reg.b_no);
			gotoxy(27,j+4);
			fflush(stdin);
			printf("Enter Issuence Date: ");
			fflush(stdin);
			gets(reg.i_date);
			fflush(stdin);
			gotoxy(27,j+5);
			printf("Enter Returned Date: ");
			fflush(stdin);
			gets(reg.r_date);
			j=3;
		}
	fwrite(&reg,sizeof(reg),1,freg);
	fclose(freg);
	}
	else
	{
	clrscr();
	gotoxy(35,4);
	printf("INVALID INPUT");
	}
	getch();
}
void Report(void)
{
	clrscr();
	char choice;
	gotoxy(7,3);
	printf("If You Want To See Records From Book Register, Press B");
	gotoxy(7,5);
	printf("And If You Want To See Records From Public Info Register, Press P");
	gotoxy(7,7);
	printf("Please Enter Your Choice: [ ]");
	gotoxy(34,7);
	choice = getche();
		if(choice == 'B' || choice =='b')
		{
			clrscr();
			FILE *fbook;
			fbook = fopen("Book","rb");
			while(fread(&bk,sizeof(bk),1,fbook)==1)
			{
				int j=1;
				gotoxy(20,j);
				printf("Book Name: ");
				fflush(stdin);
				puts(bk.book_name);
				fflush(stdin);
				j=j+1;
				gotoxy(20,j);
				printf("Book ID Or Call Number: %d", bk.b_id);
				j=j+1;
				getch();
			}
				fclose(fbook);
		}
		else if( choice == 'P' || choice =='p')
		{
			int k=1;
			clrscr();
			FILE *freg;
			freg = fopen("Library","rb");
			while(fread(&reg,sizeof(reg),1,freg)==1)
			{
				gotoxy(27,k);
				printf("Name is: ");
				puts(reg.name);
				gotoxy(27,k+1);
				printf("Father's Name is: ");
				puts(reg.f_name);
				gotoxy(27,k+2);
				printf("NIC Number is: ");
				puts(reg.NIC);
				gotoxy(27,k+3);
				printf("Book Name Is ");
				puts(reg.b_name);
				gotoxy(27,k+4);
				printf("Book Call Number is: %d", reg.b_no);
				gotoxy(27,k+5);
				printf("Book Issuece Date Is: ");
				puts(reg.i_date);
				gotoxy(27,k+6);
				printf("Book returned Date is: ");
				puts(reg.r_date);
				k++;
				getch();
			}
		fclose(freg);
		}
		else
		{
			clrscr();
			gotoxy(30,5);
			printf("INVALID INPUT");
		}
	getch();
}
void Search(void)
{
	clrscr();
	char choice;
	void Book(void);
	void P_Info(void);
	gotoxy(7,3);
	printf("If You Want To Search In Book Records, Press B");
	gotoxy(7,5);
	printf("And If You Want To Search In Public Information Records, Press P");
	gotoxy(7, 7);
	printf("Please Enter Your Choice: [ ]");
	gotoxy(34,7);
	choice = getche();
		if(choice == 'B' || choice =='b')
			Book();
		else if( choice == 'P' || choice =='p')
			P_Info();
	getch();
}
void Book(void)
{
	clrscr();
	FILE *fbook;
	int ser;
	gotoxy(13,3);
	printf("Enter Book ID or Call Number To See Its Full Record: ");
	scanf("%d", &ser);
	fbook = fopen("Book","rb");
		if(fbook==NULL)
	printf("Could Not Open");
		if(ser==bk.b_id)
		{
			gotoxy(25,6);
			printf("Book Name Is: ");
			puts(bk.book_name);
			gotoxy(25,8);
			printf("Book ID Or Call No. Is: %d",bk.b_id);
		}
		else
		{
			gotoxy(25,6);
			printf("No Record Found");
		}
	getch();
}
void P_Info(void)
{
	char ser[15];
	int k=3;
	clrscr();
	gotoxy(23,2);
	printf("Enter The NIC Number To See Full Reocrd: ");
	scanf("%d", &ser);
	FILE *freg;
	freg = fopen("Library","rb");
	while(fread(&reg,sizeof(reg),1,freg)==1);
	{
		if(ser != reg.NIC)
		{
			gotoxy(23,5);
			printf("No Record Found");
		}
		else
		{
			gotoxy(23,k);
			printf("Your Name is: ");
			puts(reg.name);
			gotoxy(23,k+1);
			printf("Father's Name is: ");
			puts(reg.f_name);
			gotoxy(23,k+2);
			printf("Yor NIC Number is: ");
			puts(reg.NIC);
			gotoxy(23,k+3);
			printf("Book Name is: %s");
			puts(reg.b_name);
			gotoxy(23,k+4);
			printf("Book Call Number is: %d", reg.b_no);
			gotoxy(23,k+5);
			printf("Book Issuece Date Is: ");
			puts(reg.i_date);
			gotoxy(23,k+6);
			printf("Book returned Date is: ");
			puts(reg.r_date);
			k=3;
		}

	}
	fclose(freg);
	getch();
}
void Modify(void)
{
	clrscr();
	char ser[15],mod=sizeof(reg);
	int j=3;
	gotoxy(23,2);
	printf("Enter The NIC Number To Modify Its Reocrd: ");
	scanf("%d", &ser);
	FILE *freg;
	freg = fopen("Library","rb+");
	while(fread(&reg,sizeof(reg),1,freg)==1);
	{
		if(ser==reg.NIC)
		{
			gotoxy(27,2);
			printf("Enter The Name: ");
			fflush(stdin);
			gets(reg.name);
			fflush(stdin);
			gotoxy(27,j);
			printf("Enter Father's Name: ");
			fflush(stdin);
			gets(reg.f_name);
			fflush(stdin);
			gotoxy(27,j+1);
			printf("Enter Book Name: ");
			fflush(stdin);
			gets(reg.b_name);
			fflush(stdin);
			gotoxy(27,j+2);
			printf("Enter Book ID or Call No: ");
			scanf("%d", &reg.b_no);
			gotoxy(27,j+3);
			fflush(stdin);
			printf("Enter Issuence Date: ");
			fflush(stdin);
			gets(reg.i_date);
			fflush(stdin);
			gotoxy(27,j+4);
			printf("Enter Returned Date: ");
			fflush(stdin);
			gets(reg.r_date);
			j=3;
		}
		else
			printf("Record Not Found");
	}
	fseek(freg,-mod,SEEK_CUR);
	fwrite(&reg,sizeof(reg),1,freg);
	fclose(freg);
	getch();
}
void Delete(void)
{
	getch();
}

[LB]

Edit your post and put the code [code]between code tags[/code] so it has syntax highlighting. You should also recopypaste it because the tabbing got removed.

[therockon7throw]

Hi

It is very hard to follow your code, however, if your code work for a single entry , it means you are overwriting the existing data when you try to enter more entries.

I think you should use an array of your classes to store the data in, for example

int max_number = 100;

	Regestration 	reg[max_number];
	Book			books[max_number];

	int count = 0 ;
	while(count < 100 ){

		reg[ count ].name = "some name";
		reg[count].i_date = "some date";
		// and other things

		// the same for books
		books[count].b_id = 12;//some id
		books[count].book_name = "some book name";
		     count++;
	}

[therockon7throw]

So you may use array in your loop

for(i=0;i<=3;i++)
{
		clrscr();
		gotoxy(27, 2);
		printf("Enter The Name: ");
		fflush (stdin);
		gets(reg.name);
		fflush(stdin);
		gotoxy(27, j);
		printf("Enter Father's Name: ");
		fflush(stdin);
		gets(reg[i].f_name);
		fflush(stdin);
		gotoxy(27, j + 1);
		printf("Enter National Identity Card Number: ");
		fflush(stdin);
		gets(reg[i].NIC);
		fflush(stdin);
		gotoxy(27, j + 2);
		printf("Enter Book Name: ");
		fflush(stdin);
		gets(reg[i].b_name);
		fflush(stdin);
		gotoxy(27, j + 3);
		printf("Enter Book ID or Call No: ");
		scanf("%d", &reg.b_no);
		gotoxy(27, j + 4);
		fflush(stdin);
		printf("Enter Issuence Date: ");
		fflush(stdin);
		gets(reg[i].i_date);
		fflush(stdin);
		gotoxy(27, j + 5);
		printf("Enter Returned Date: ");
		fflush(stdin);
		gets(reg[i].r_date);
		j = 3;
	}		

I think it should work than :-)

[Aroona]

I took array for the structure, it only shows me correct output when I see records just after entering data. But when I again execute it, it just show me the messages written in double quotes of printf() statement, not the data. I think when I execute it again, the data in "library" file lost every time.
I think there is a problem with file because the library file is of 198 bytes and book file is of 208 bytes. I have just two records in book file but I have 3 records in library file. So the library file should be larger than book file in size. but it is not.