Problem of infinite loop in C

Here I have my loop:

Code:

---

  FILE * file = NULL;
  fopen ( "file.txt", "a");
  number_centre long;
  long l = 0;
  scanf ( "% id", &  number_centre);
  do
  (
  l + +;
  fprintf (file, "centre_% i.visble = false \ n", l);
  ) While (l! =  number_centre);

---

and i realize that I am getting an infinite loop.

In your scanf "% ld" is not there and why do you put it instead of "% id"?

Code:

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FILE * file = NULL;
 fopen ( "file.txt", "a");

---

This is incomplete, read your course files.

As mentioned above the function declaration for a long is %ld and not %i.

Quote:

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the file is missing because of the fclose or check if the file is open

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but I have to set it before and then for the "% i" I tried to replace and I repeat it but does not change ...

Hi Firon,

To solve your program use Turbo C++ 3.0 IDE and trace your program by using functional key F7 and use add watch also. Then you can identify the problem very easily