[En-Nut-Discussion] pointer don't work?

[Bernard Fouché]

Le 12/05/2011 15:28, Landsperger, Werner a écrit :
> char *buff;
> buff = malloc(128);
> char *pointer;
>
> cnt = fread(buff, 1, 128, istream);    // read in a buffer ->  cnt = 128
> pointer =&buff;                               // should set a pointer
> to buff
> cnt = strlen(pointer);                        // should be 128 but ->
> cnt = 22 ????
>
I'm surprised that the compiler does not complain about 'pointer=&buff' 
: 'pointer' should be 'char **' to use it that way. That's why it does 
not work: you set 'pointer' to the adress of 'buff', not to the value of 
'buff'. You should have 'pointer=buff'. And as Stefan Hax wrote, you 
must also be sure that what you got from fread() is null terminated to 
have strlen() to work correctly.

     Bernard