basic c question...

you dont need to know the exact size of data; instead, declare a buffer big enough to contain a line of data, something like this:

#define SHOULD_BE_ENOUGH 1024

char buffer[SHOULD_BE_ENOUGH];
fgets(bufer,SHOULD_BE_ENOUGH,fp);

Or in psuedocode:

string="";buffer[X];while( fgets(buffer,X,stdin) ){     string = string + buffer;}return(string);

Depends a bit on the setup you have.

Quote:

Original post by fnm you dont need to know the exact size of data; instead, declare a buffer big enough to contain a line of data, something like this: #define I_HOPE_THIS_IS_ENOUGH 1024 char buffer[I_HOPE_THIS_IS_ENOUGH]; fgets(bufer,I_HOPE_THIS_IS_ENOUGH,fp);

Made some edits.

The point being, there's no guarantee you won't be fed a line that's a hundred million characters long.

Quote:

Original post by FreJa Hi, I want to use fgets to read from stdin, so: fgets(str, MAXINT, stdin); however, I dont know the size of str in advance, so how do I define/alloc it ? Huge Thanks

Take a look at this usenet entry on Google Groups, which pretty much describes your problem.