Getting home directory in Mac OS X using C language

How can I get the path of home directory in Mac OS X using C language in XCode editor.

#include <stdlib.h>
#include <stdio.h>    

int main(void)
{
    const char *homeDir = getenv("HOME");

    if (homeDir)
        printf("Home directory is %s\n", homeDir);
    else
        printf("Couldn't figure it out.\n");

    return 0;
}