Programe error

**colincsf** · 12-26-2002

this is the my programme i can't seems to continue the programe
after doing the 3 printf and the fprintf

Code:

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

#define N 50

FILE *fpHrWorked;
FILE *fpLatestEmp;
FILE *fpPay;
FILE *fpRead;

struct data
{
	int EmpID;
	char Name[30];
	int Category;
	float RatePerHr;
	int HourWorked;
}Employee[N];

struct Hrworked
{
	int Emp_ID;
	int HrWork;
	int ClientID;
}Worked[N];

int main(void)
{
	int i=0;
	int a=0;
	int w=0;
	int n=0;

	fpHrWorked=fopen("HrWorked.dat","w");
	fpLatestEmp=fopen("LatestEmp.dat","w");
	fpPay=fopen("Pay.dat","w");
	fpRead=fopen("temp.dat","r");

		printf("\n\n\n");
		printf("\t\tPlease Enter Employee ID(*No More Than 999*); ");
		scanf("%d",&Worked[n].Emp_ID);
		printf("\t\tPlease Enter Working Hour(*No More Than 999*); ");
		scanf("%d",&Worked[n].HrWork);
		printf("\t\tPlease Enter Client ID(*No More Than 9*); ");
		scanf("%d",&Worked[n].ClientID);
		n++;
		fprintf(fpHrWorked,"%03d|%d|%d\n",Worked[i].Emp_ID,Worked[i].HrWork,Worked[i].ClientID);

//error Start here onwards

	system("rename EMP.dat Temp.dat");
	n=0;
	while(!feof(fpRead))
	{
		fscanf(fpRead,"%d|%30s|%d|%f|%d",&Employee[n].EmpID,Employee[n].Name,&Employee[n].Category,&Employee[n].RatePerHr,&Employee[n].HourWorked);
		n++;
	}
	i=0;
	while(!feof(fpHrWorked))
	{
		fscanf(fpHrWorked,"%d|%d|%d",&Worked[i].Emp_ID,&Worked[i].HrWork,&Worked[i].ClientID);
		i++;
	}
	for(n=0;n<=i;n++)
	{
		for(a=0;a<=i;a++)
		{
			if(Employee[n].EmpID==Worked[a].Emp_ID)
			{
				Employee[n].HourWorked=Employee[n].HourWorked+Worked[i].HrWork;
				fprintf(fpLatestEmp,"%d|%30s|%d|%f|%d",Employee[n].EmpID,Employee[n].Name,Employee[n].Category,Employee[n].RatePerHr,Employee[n].HourWorked);
				fprintf(fpPay,"%d|%d|%s|%d|%d",Worked[i].ClientID,Employee[n].EmpID,Employee[n].Name,Employee[n].HourWorked,Employee[n].RatePerHr);
				break;
			}
			else
			{
				fprintf(fpLatestEmp,"%d|%30s|%d|%f|%d",Employee[n].EmpID,Employee[n].Name,Employee[n].Category,Employee[n].RatePerHr,Employee[n].HourWorked);
				fprintf(fpPay,"%d|%d|%s|%d|%d",Worked[i].ClientID,Employee[n].EmpID,Employee[n].Name,Employee[n].HourWorked,Employee[n].RatePerHr);
			}
		}
	}
	fclose(fpPay);
	fclose(fpRead);
	fclose(fpHrWorked);


	system("delete temp.dat");
	return 0;
}

**Longie** · 12-26-2002

Ok, here is the problem.

You do know that C is case-sensitive. This means HeLLo is NOT the same as hello.

First you have

Code:

fpRead=fopen("temp.dat","r");

Then you use

Code:

system("rename EMP.dat Temp.dat");

You need to change Temp.dat (notice the capital) to temp.dat.

I noticed you don't use EMP.day there, you should make sure the file exists on your hard drive first. YOu can do this in the program by having something like this

Code:

FILE *oldemp;

if((oldemp = fopen("EMP.dat", "r")) == NULL) {
    printf("Error, EMP.dat doesn't exist\n");
    return(1);
}
else
    fclose(oldtemp);

Put the 'FILE *oldemp;' with all the other FILE* declarations. The if statement could go between where you pasted the comment and where you have system("rename ... ");, but can go anywhere inside the main body.

Hope this has been some help

**Hammer** · 12-26-2002

>>i can't seems to continue the programe after doing the 3 printf and the fprintf
Can you explain your question better please?

>>fopen()
Always check this function worked before trying to use file returned FILE*.

>>You need to change Temp.dat (notice the capital) to temp.dat.
Well, this depends on the OS, as the rename is done via system(). If you're on a windows platform, anything passed to system() will be case insensative, IIRC. Anyway, calling system to rename a file is not good, try using the rename() function that's in stdlib.h
And on this point, the file you're renaming TO, has just been fopen()'d (ignoring case), so that maybe a problem.

>>while(!feof(fpRead))
This is not the way to control the loop. Use the return code from the reading function (fscanf() in this case).

**colincsf** · 12-26-2002

i keep getting error after performing the printf("please enter ur employeee id") and so on, i did have the file needed by creating it myself.so i dunno why i'm having error after peforming the 3 first printf and than the fprintf

**Hammer** · 12-26-2002

>>i keep getting error
My crystal ball doesn't see errors in other peoples code, only my own, so maybe you'd better tell us what the "error" actually is. That way I don't need to second guess you.

**colincsf** · 12-26-2002

okies now its say duplicate file name or file in use and i change abit of the coding already so it like this right now:

Code:

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

#define N 50

FILE *fpHrWorked;
FILE *fpLatestEmp;
FILE *fpPay;
FILE *fpRead;

struct data
{
	int EmpID;
	char Name[30];
	int Category;
	float RatePerHr;
	int HourWorked;
}Employee[N];

struct Hrworked
{
	int Emp_ID;
	int HrWork;
	int ClientID;
}Worked[N];

int main(void)
{
	int i=0;
	int a=0;
	int w=0;
	int n=0;

	fpHrWorked=fopen("HrWorked.dat","w");
	fpLatestEmp=fopen("LatestEmp.dat","w");
	fpPay=fopen("Pay.dat","w");
	fpRead=fopen("EMP.dat","r");

	if((fpRead = fopen("EMP.dat", "r")) == NULL)
	{
    printf("Error, EMP.dat doesn't exist\n");
    return(1);
	}

else
{
    fclose(fpRead);


		printf("\n\n\n");
		printf("\t\tPlease Enter Employee ID(*No More Than 999*); ");
		scanf("%d",&Worked[n].Emp_ID);
		printf("\t\tPlease Enter Working Hour(*No More Than 999*); ");
		scanf("%d",&Worked[n].HrWork);
		printf("\t\tPlease Enter Client ID(*No More Than 9*); ");
		scanf("%d",&Worked[n].ClientID);
		n++;
		fprintf(fpHrWorked,"%03d|%d|%d\n",Worked[i].Emp_ID,Worked[i].HrWork,Worked[i].ClientID);


	system("rename EMP.dat Temp.dat");
	n=0;
	while(!feof(fpRead))
	{
		fscanf(fpRead,"%d|%30s|%d|%f|%d",&Employee[n].EmpID,Employee[n].Name,&Employee[n].Category,&Employee[n].RatePerHr,&Employee[n].HourWorked);
		n++;
	}
	i=0;
	while(!feof(fpHrWorked))
	{
		fscanf(fpHrWorked,"%d|%d|%d",&Worked[i].Emp_ID,&Worked[i].HrWork,&Worked[i].ClientID);
		i++;
	}
	for(n=0;n<=i;n++)
	{
		for(a=0;a<=i;a++)
		{
			if(Employee[n].EmpID==Worked[a].Emp_ID)
			{
				Employee[n].HourWorked=Employee[n].HourWorked+Worked[i].HrWork;
				fprintf(fpLatestEmp,"%d|%30s|%d|%f|%d",Employee[n].EmpID,Employee[n].Name,Employee[n].Category,Employee[n].RatePerHr,Employee[n].HourWorked);
				fprintf(fpPay,"%d|%d|%s|%d|%d",Worked[i].ClientID,Employee[n].EmpID,Employee[n].Name,Employee[n].HourWorked,Employee[n].RatePerHr);
				break;
			}
			else
			{
				fprintf(fpLatestEmp,"%d|%30s|%d|%f|%d",Employee[n].EmpID,Employee[n].Name,Employee[n].Category,Employee[n].RatePerHr,Employee[n].HourWorked);
				fprintf(fpPay,"%d|%d|%s|%d|%d",Worked[i].ClientID,Employee[n].EmpID,Employee[n].Name,Employee[n].HourWorked,Employee[n].RatePerHr);
			}
		}
	}
}
	fclose(fpPay);
	fclose(fpRead);
	fclose(fpHrWorked);


	system("delete Temp.dat");
	return 0;
}

**quzah** · 12-26-2002

okies now its say duplicate file name or file in use and i change abit of the coding already so it like this right now:

Asked, and answered:

And on this point, the file you're renaming TO, has just been fopen()'d (ignoring case), so that maybe a problem.

You should listen to Hammer.

Quzah.

**colincsf** · 12-26-2002

okies sorry didn't understand so now i remove the system(rename Emp.dat Temp.dat) and when i run it, the program just hang & do nothing after this.example of output:

Employee Id:1
Hour Worked:1
Client Id:1

nothing happen after those 3 and i dun think the programme have ended yet its just stuck at some place

**Hammer** · 12-27-2002

Did you check that the fopen()'s actually worked? Maybe you're looping on a bad file stream.

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