error_compilation_cast_directory

strycnine · 11-06-2006, 03:25 PM

#include<sys/types.h>
#include<sys/stat.h>
#include<dirent.h>
#include<stdio.h>
#include<stdlib.h>

main()
{
int i;
mode_t mod;
DIR *director;
mod=0777;
for(i=0; i<5; i++)
{
i=(char)i;
if((mkdir(i, mod)) != 0)
{
fprintf(stderr, "Error creating directory!!\n");
exit(1);
}
if((director=opendir(i)) == NULL)
{
fprintf(stderr, "Error opening directory %d\n", i);
exit(1);
}

}
return 0;
}
I have this program
t compilation it gives me this errors:
dir2.c: In function `main':
dir2.c:16: warning: passing arg 1 of `mkdir' makes pointer from integer without a cast
dir2.c:21: warning: passing arg 1 of `opendir' makes pointer from integer without a cast

how do I use this cast thing??
the program is must do I simple task
creat an folder named 0
and then enter 0 and create 1...and so on until 5

thx

If you have link where I can learn about C functions(for linux or windows) with examples please share
thx again

tuxdev · 11-06-2006, 03:39 PM

Put your code in [code] tags to keep indentation, and use a monospace font.

Code:

i=(char)i;

This isn't useful, unless you are trying to truncate the value to 8 bits and even then it is system dependent.

Code:

if((mkdir(i, mod)) != 0)

You are supposed to pass a char*, not an int as the first parameter, just like the compiler told you

Code:

if((director=opendir(i)) == NULL)

Ditto, and be consisten about the use of NULL or 0. I prefer 0 myself.

Isolate the inside of the loop into a function, then just call it how ever many times you need to.

Code:

foo("0");
foo("1");
foo("2");
foo("3");
...