fork.c

pthread soure code

  #include <stdio.h>  
  #include <stdlib.h>  
  #include <unistd.h>  
  
  int count=0;
  
  void parent(void);
  void child(void);

  void parent(void)
  {
    while(1)
    {
    	count+=10;
    	printf("parent: %d\n",count);
    	sleep(1);	
    }
  }
  void child(void)
  {
    while(1)
    {
    	count++;
    	printf("child: %d\n",count);
    	sleep(1);
    }  	
  }
      
  void main(void)  
  {  
    pid_t pid;  
 
    printf("hello\n");  
   
    pid = fork();  
   
    switch (pid) {  
   
      case -1: 
      	printf("failure!\n"); 
      	break;  
      case  0:
      	printf("I am child!\n");
      	child();
       	break;  
      default: 
      	printf("my child is %d\n",pid); 
      	parent();
      	break;  
    }  
   }