Problem with strlen() returning void - need help

[giladt]

Hi,

I'm a novice programmer and I've come across the following problem:

I am trying to get strlen for a cosntant char array but I get back a void no matter what I try. The code looks like this:

if (is_define(&lineptr)) {
while (currentline[strlen(currentline)-BKSLSH_OFFSET] == '\\')
lineptr = fgets(currentline, LINE_MAX, fileptr);
}
currentline is a global variable, its definition is:
char currentline[LINE_MAX+1]; /*LINE_MAX = 2048*/

But strlen keeps returning void. I tried using a pointer to the array instead but that didn't help either. I also did the strlen on a separate line, which doesn't help.

I also double checked the contents of currentline:
currentline[0] through currentline[27] are all characters
currentline[28] is a \0

But it doesn't work!

Any ideas anybody?

Thanks,
Gilad

[giladt]

Forgot to say I'm writing in C.

Gilad

Hi,

I'm a novice programmer and I've come across the following problem:

I am trying to get strlen for a cosntant char array but I get back a void no matter what I try. The code looks like this:

if (is_define(&lineptr)) {
while (currentline[strlen(currentline)-BKSLSH_OFFSET] == '\\')
lineptr = fgets(currentline, LINE_MAX, fileptr);
}
currentline is a global variable, its definition is:
char currentline[LINE_MAX+1]; /*LINE_MAX = 2048*/

But strlen keeps returning void. I tried using a pointer to the array instead but that didn't help either. I also did the strlen on a separate line, which doesn't help.

I also double checked the contents of currentline:
currentline[0] through currentline[27] are all characters
currentline[28] is a \0

But it doesn't work!

Any ideas anybody?

Thanks,
Gilad

[giladt]

Well, I managed to work around it, but it's still quite puzzling.

What i did to solve it was to assign strlen(currentline) to a variable and then use the variable in the while statement instead and now it works.

Does anyone have an idea why this happens?

Gilad

[Ganon11]

Not sure. I usually use the built-in std::string class for my strings, which comes with a .length() function. Or, if I need the size of an array in general, I make my own variable to keep track of it. I haven't used strlen().