the device named ``random"

#include 
#include 
#include  
#include  
#include  

int main(void)
{

 int i,j,randomfd;
 int rand[100]; 

//for(i=0;i<10;i++)

//{  

//srand(time(NULL)+getpid()); 

//      printf("%d ",rand());

//}      printf("\n");
       randomfd=open("/dev/random",O_RDONLY);  

 if(!randomfd)  
 printf("open random device error\n");

 for(i=0;i<100;i++) 
{ 
 read(randomfd,rand,10);  
 for(j=0;j<2;j++) 
  printf(" %d",rand[j]);  
 printf("\n");   
}

}