Fork et programmation C

#include<stdio.h>  
#include<sys/types.h>  
#include<unistd.h>  
#include <sys/wait.h>   
#define uchar unsigned char  
#define NB_PROCESS 11 
int main()  
{  
 uchar bcl=0;  
 int nb;  
 int pidF[NB_PROCESS];  
 uchar tab[NB_PROCESS]={1,2,3,5,7,11,13,17,19,23,31};  
 printf("Entrer un nb: \n");  
 scanf("%d",&nb);  
for (bcl=0;bcl<NB_PROCESS;bcl++){  
  if ((pidF[bcl]=fork())==0){  
   sleep(1);  
   if (nb%tab[bcl]){  
 printf("Je ne divise pas %d par %d et je suis le process %d\n",nb,tab[bcl],getpid());  
   }  
   else{  
 printf("Je divise %d par %d et je suis le process %d\n",nb,tab[bcl],getpid());  
   }  
   _exit(0);  
 }  
 else{  
  printf("je suis le pere process %d et creation de %d\n",getpid(),pidF[bcl]);  
  //  
}  
}  
waitpid(pidF[0], NULL, 0);   
waitpid(pidF[1], NULL, 0);   
waitpid(pidF[2], NULL, 0);   
waitpid(pidF[3], NULL, 0);   
waitpid(pidF[4], NULL, 0);   
waitpid(pidF[5], NULL, 0);   
waitpid(pidF[6], NULL, 0);   
waitpid(pidF[7], NULL, 0);   
waitpid(pidF[8], NULL, 0);   
waitpid(pidF[9], NULL, 0);   
waitpid(pidF[10], NULL, 0);  
return 0;  
}