Fork process program

#include<stdio.h>
#include<sys/types.h>

void main()
{
pid_t pid;
pid = fork();

if (pid==0)
    {
    printf("\n Child is executing... \n");
    printf("\n Child Process id is : %d \n",getpid());
    printf("\n Parent Process id is : %d \n",getppid());
    }
else if(pid>0)
    {
    printf("\n Parent is exectuting... \n");
    printf("\n Parent Process id is : %d \n",getpid());
    }
    else
        {
        printf("Error!");
        }

}