Thread: Reading a file

I am using Visual C++ 6.0 and I have a code that we have written a long time ago for running some simulations. It used to work fine but now something is wrong. It cannot access a file with extension .f. This file (predat.f) includes data generated for the simulations using another code.

What do think, does this have something to do with the file type? If yes, could anyone give me an update of what file type(s) could be used in this case? Thank you for your help!

Code:

#include	"param.h"

extern long
#include	"gintdat.h"

extern double
#include	"gfloatdat.h"

void Addjobs(long);	
void Iter(long);					
void Savestat();					
void Pstatus();							
FILE *predat, *dataf;				
#include	<process.h>

void Update(long rtime)				
{
	long	fnojobs, fnomach, curjob, i, im, ind;	
	
	if (rtime < 10)									
	{
		if ( (predat = PREDAT) == NULL ) 
		{
		printf("\n\nCould not open file predat.f\n");		
		printf("\nPress CTRL-C to cancel program execution.\n");		
                cin >> apu;

	               }

	iter = iterind-1; 				
		
	fscanf(predat,"%ld %ld %ld %lf ", &seed, &fnojobs, &fnomach, &ddrge);

I don't think you've given enough code to answer you problem. The line

if ( (predat = PREDAT) == NULL )
{
printf("\n\nCould not open file predat.f\n");
printf("\nPress CTRL-C to cancel program execution.\n");
cin >> apu;

}

Looks wrong because you are assigning predat, a FILE*, to a PREDAT. Unless if predat is defined to be something like
#define PREDAT stdin it's probably wrong. Secondly, you probably want to use fopen to open the file. If predat.f is a text file, you would then do something like

Code:

FILE* predat = fopen("predat.f", "r");
if (predat == NULL)
{
       fprintf(stderr, "File error\n");
       exit(-1);
}

You were quite right, I had written a part of the code in another file and discovering that helped me to figure out what was wrong. Thanks for your help.