MATERI UAP II (SERVER)

// LINK SOAL : https://www.dropbox.com/s/s148os0ispnnpb3/S__5021795.jpg?dl=0

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <sys/ipc.h>
#include <sys/types.h>
#include <sys/sem.h>
#include <sys/shm.h>

struct data {
    char provider[16];
    int speed;
    int price;
    char area[100];
    char tgl[100];//tambahan di soal ga ada
};

int main(){
    struct sembuf s;
    int h=shmget(123456,sizeof(struct data),IPC_CREAT|0666);
    int e=semget(123456,1,IPC_CREAT|0666);
    semctl(e,0,SETVAL,0);
    struct data *internet=(struct data*)shmat(h,NULL,0666);
    int flag,i;
    //biar ga boleh sama
    char list_nama_yang_udah [100][100];
    int jumlah=0;
    printf("\n\n====================================\nPROGRAM REGISTRASI INTERNET - CLIENT\n====================================\n\n");
    do{
        printf("\nWaiting for Input\n");
        s.sem_num=0;
        s.sem_op=-1;
        s.sem_flg=0;
        semop(e,&s,1);
        flag=0;//kondisi ga ada yg sama
        for(i=0;i<jumlah;i++){
            if(strcmp(list_nama_yang_udah[i],internet->provider)==0){
                flag=1;//kalo pas di cek ada yg sama
                printf("\nNama Provide sudah terdaftar\n");
                break;
            }
        }
        if(strcasecmp("exit",internet->provider)!=0&&flag==0){
            printf("\nNama Provide : %s\n",internet->provider);
            strcpy(list_nama_yang_udah[jumlah],internet->provider);
            jumlah++;//jumlah data udah nambah;
            printf("Speed Internet : %d Mbps\n",internet->speed);
            if(internet->speed>50)
                printf("Internet Category : Fast\n");
            else if(internet->speed>25)
                printf("Internet Category : Standart\n");
            else if(internet->speed>0)
                printf("Internet Category : Low\n");
            printf("Internet Raw Price : Rp. %d,00\n",internet->price);
            if(internet->price>=6000)
                printf("Internet Service : Premium\n");
            if(internet->price>=1000)
                printf("Internet Service : Standart\n");
            printf("Area Jangkauan : %s\n",internet->area);
            int total;
            total=internet->speed*internet->price;
            printf("Internet Total : Rp. %d,00\n",total);
        }
        else if(flag!=1)//kalo dia bener2 exit bukan karena kenda data sama
            printf("\nExiting Program...\n");
    }while(strcasecmp("exit",internet->provider)!=0);
    shmdt(&internet);
    shmctl(h,IPC_RMID,0);
    semctl(e,0,IPC_RMID);
}