#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
 
int myglobal;
 
 void *thread_function(void *arg) {
  int i,j;
  for ( i=0; i<20; i++ ) {
    j=myglobal;
    j=j+1;
    printf(".");
    fflush(stdout);
   sleep(1);
    myglobal=j;
  }
  return NULL;
}
 
int main(void) {
 
  pthread_t mythread;
  int i;
 
  if ( pthread_create( &mythread, NULL, thread_function, NULL) ) {
    printf("error creating thread.");
    abort();
  }
 
  for ( i=0; i<20; i++) {
    myglobal=myglobal+1;
    printf("o");
    fflush(stdout);
    sleep(1);
  }
 
  if ( pthread_join ( mythread, NULL ) ) {
    printf("error joining thread.");
    abort();
  }
 
  printf("\nmyglobal equals %d\n",myglobal);
 
  exit(0);
}
 
OK what I am doing is when I open up the project I create the work space and give it a name. Now when I copy this code into the project and click compile, I get 1 error saying "Cannot open include file: 'pthread.h': No such file or directory". Now I know that in C++ you can have are .cpp file and a .h file. Now how can I prevent this from happening. I tried changing it up a little. I created a header file and pasted this part in it:
#include <iostream>
//#include <FK2008Sample2.h>
 
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <FK2008Sample>
int myglobal;
 
 void *thread_function(void *arg) {
  int i,j;
  for ( i=0; i<20; i++ ) {
    j=myglobal;
    j=j+1;
    printf(".");
    fflush(stdout);
   sleep(1);
    myglobal=j;
  }
  return NULL;
}
 
and then I created a .cpp file and pasted this in it:
using namespace std;
 
int main(void) {
 
  pthread_t mythread;
  int i;
 
  if ( pthread_create( &mythread, NULL, thread_function, NULL) ) {
    printf("error creating thread.");
    abort();
  }
 
  for ( i=0; i<20; i++) {
    myglobal=myglobal+1;
    printf("o");
    fflush(stdout);
    sleep(1);
  }
 
  if ( pthread_join ( mythread, NULL ) ) {
    printf("error joining thread.");
    abort();
  }
 
  printf("\nmyglobal equals %d\n",myglobal);
 
  exit(0);
 
}