i was reading the FAQ here and in the the c implementation for waiting for a key press the code is:
#include <stdio.h>
int main(void)
{
int ch;
printf ("Press [Enter] to continue");
while ((ch = getchar()) != '\n' && ch != EOF);
return(0);
}
...what is EOF???
TY
EOF is a constant defined as -1. It also indicates the end of a file when using the file-reading function fread and the like.
getchar returns EOF when the end of stdin has been reached and the user has inputted no more characters.
Peter O. Programming tips
Just a warning, all that the standard (7.19.1) requires is that
So, it is possible in theory to have an implementation where the value of EOF is not -1. So, it would not be a good idea to replace EOF by -1 .EOF ... expands to an integer constant expression, with type int and a negative value, that is returned by several functions to indicate end-of-file, that is, no more input from a stream
The one who says it cannot be done should never interrupt the one who is doing it.
It's nothing wrong if you replace it with -1. As poccil already wrote, EOF is a constant.So, it would not be a good idea to replace EOF by -1 .
Current projects:
1) User Interface Development Kit (C++)
2) HTML SDK (C++)
3) Classes (C++)
4) INI Editor (Delphi)
Yes, EOF is a constant, but I agree with pinko_liberal, since the standard says that the value of the EOF constant is not per definition -1. So it would be recommendable to use EOF instead of -1. If you would compile on a different system, which uses a different value for EOF, then you might get problems.
