Check if user is root in C?

Question

How can I verify if the user is root?

Answer 1

better to use getuid or geteuid but it is in zconf.h header file and you must enter that like bellow :

#include 
#include 
int main()
{
int a;
a=getuid();
//or you can use  a=geteuid();
//euid is effective user id and uid is user id 
// both euid and uid are zero when you are root user 
if (a==0){
printf("you are root user");
//so you can do what`enter code here`ever `enter code here` you want as root user
}
else
printf("please run the script as root user !");
return 0;
}