//gcc -std=gnu99 -o test -test.c
//        test.c
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>

int main(){

        int i;
        pid_t holic;
        pid_t zakaznik;

        holic = fork();
        if(holic < 0){
                printf("Error occoured with fork()\n");
                exit(99);
        }
        else if (holic == 0){
                printf("barber\n");
                exit(0);
        }

        for (i = 0; i < 9; i++){
                        zakaznik = fork();
                        if (zakaznik < 0){
                                printf("Error occoured with fork()\n");
                                exit(99);
                        }
                        else if(zakaznik== 0){
                                printf("customer %d\n", i);
                                exit(0);
                        }
        }

       

        return 0;
}