Obtaining allocated string length...

I know you can do:

char word[100];

int maxlen = sizeof(word);

//maxlen = 100;


But when I pass the string into a function, and then try this approach, it gives me the size of a char(4 bytes).

I am of course, trying to avoid passing the length of the string as a parameter.

I have tried:

char * string_func( char *in);

And also:

char * string_func( char in[]);

The results were identical.

Any ideas?

> I am of course, trying to avoid passing the length of the string as a parameter.
Well you can't.

All arrays are passed as pointers to the first element, so all sizeof will be able to tell you is the size of that pointer.

Instead of:
int maxlen = sizeof(word);

Try:
int maxlen = strlen(word);

Since sizeof(word) will give the you size of the pointer to word (as it points to a char array). strlen(word) would be a better choice since it will return an int value that is the length of the word word is pointing to.

And don't forget #include<string.h>

Just a thought

while calling, call as string_func(word);

and while declaring

use char *string_func( char word[100])

inside this function try strlen() to get the size of the string.

cheers,

strlen() only works on 'c' strings. If you wanted to check the length of any dynamically allocated pointer, just examine the block header.