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#include <stdio.h>#include <pthread.h>#include <unistd.h> /*getpid()*/void *create(void *arg){    printf("New thread .... \n");    printf("This thread's id is %u  \n", (unsigned int)pthread_self());    printf("The process pid is %d  \n",getpid());    return (void *)0;} int main(int argc,char *argv[]){    pthread_t tid;    int error;    printf("Main thread is starting ... \n");    error = pthread_create(&tid, NULL, create, NULL);    if(error)    {        printf("thread is not created ... \n");        return -1;    }    printf("The main process's pid is %d  \n",getpid());    sleep(1);    return 0;}