how to represent null string in c code example

Example 1: how to denote an empty string in c

#include <stdio.h>
#include <string.h>

int main()
{
    char empty[5] = { '\0' };
    char null[5];

    if( strcmp(empty,null)==0 )
        puts("Strings are the same");
    else
        puts("Strings are not the same");

    return(0);
}

Example 2: c null define

#define NULL ((void *)0)