#include <stdio.h>
#include <errno.h>
int main()
{
    char buf[256],*s;
    int r;
    r= mkdir("newdir", 0766);
    if(r < 0)
        printf("errno=%d:%s\n",errno,strerror(errno));
    r = chdir("newdir");
    s = getcwd(buf,256);
    printf("CWD = %s\n",s);
}