#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
typedef struct
{
    char vb[100];
    char mod[100];
    char col[100];
    char har[100];
    float cina;
}phones;

void new_base()
{
    FILE *f;
    phones t;
    int i,n;
    f=fopen("Baza.bd","wb");
    printf("\nKilkist telephoniv:");
    scanf("%d",&n);
    for (i=0;i<n;i++)
    {
        system("cls");
        printf("\n%d-j zapys\n",i+1);
        printf("Vyrobnyk: ");
        scanf("%s",t.vb);
        printf("model: ");
        scanf("%s",t.mod);
        printf("Kolir: ");
        scanf("%s",t.col);
        printf("harakterystyky: ");
        scanf("%s",t.har);
        printf("Cina: ");
        scanf("%f",&t.cina);
        fwrite(&t,sizeof(t),1,f);
    }
    fclose(f);
 }
int write(FILE *f)
{
    system("cls");
    phones t;
    f=fopen("Baza.bd","rb");
    fread(&t,sizeof(phones),1,f);
    while (!feof(f))
    {        
        printf("\n%s %s/%s/  %4.2f",t.vb,t.mod,t.col,t.cina);
        fread(&t,sizeof(phones),1,f);     
     }
    fclose(f);
    printf("\n\n\n...");
    getch();
    return 0;
}
void searsh(FILE *f)
{
    system("cls");
    phones t;
    int nom;
    //system("cls");
    printf("\nVvedit nomer zapysu: ");
    scanf("%d",&nom);
    f=fopen("Baza.bd","rb");
        nom--;
        fseek(f,nom*sizeof(phones),SEEK_SET);
        fread(&t,sizeof(phones),1,f);
        printf("\n%s %s/%s/  %4.2f",t.vb,t.mod,t.col,t.cina);
    fclose(f);
    printf("\n\n\n...");
    getch();    
}

void redag(FILE *f)
{
    system("cls");
    phones t;
    int nom;
    printf("\nVvedit nomer zapysu:");
    scanf("%d",&nom);
    f=fopen("Baza.bd","r+b");
    fseek(f,(nom-1)*sizeof(phones),SEEK_SET);
    printf("\nVvedennya novoiinformacii:\n");
    printf("Vyrobnyk: ");
    scanf("%s",t.vb);
    printf("model: ");
    scanf("%s",t.mod);
    printf("Kolir: ");
    scanf("%s",t.col);
    printf("harakterystyky: ");
    scanf("%s",t.har);
    printf("Cina: ");
    scanf("%f",&t.cina);
    fwrite(&t,sizeof(t),1,f); 
    fclose(f);
    printf("\n\n\n");    
}

void dodav(FILE *f)
{
    system("cls");
    phones t;
    int i,new;
    f=fopen("Baza.bd","ab");
    printf("\nVvedit kilkist novyh zapusiv:");
    scanf("%d",&new);
    while (new<1)
    {
          printf("\nNevirna kilkist zapysiv...");
          printf("\nVvedit kilkist novyh zapysiv: ");
          scanf("%d",&new);
    }
    for (i=0;i<new;i++)
    {
        printf("Vyrobnyk: ");
        scanf("%s",t.vb);
        printf("model: ");
        scanf("%s",t.mod);
        printf("Kolir: ");
        scanf("%s",t.col);
        printf("harakterystyky: ");
        scanf("%s",t.har);
        printf("Cina: ");
        scanf("%f",&t.cina);
        fwrite(&t,sizeof(t),1,f);
    }
    fclose(f);
    printf("\n\n\n...");            
}

void delet(FILE *f)
{
    system("cls");
    phones t[50];
    f=fopen("Baza.bd","rb");
    int nom,i=-1,j;
    printf("\nVvedit nomer zapysu:");
    scanf("%d",&nom);
    while (!feof(f))
    {
          i++;
          fread(&t[i],sizeof(phones),1,f);
    }
    fclose(f);
    f=fopen("Baza.bd","wb");
    for (j=0;j<i;j++)
        if (j!=(nom-1)) fwrite(&t[j],sizeof(phones),1,f);
    fclose(f);   
    printf("\n\n\n...");    
}
int main()
{
    FILE *f;
    int pp;
    while (pp!=0)
    {
          system("cls");
          printf("\nRobota z bazoyu dannyh....");
          printf("\nVyberit potribnu diyu:\n");
          printf("\n1 stvorenya novoi bazu danuh");
          printf("\n2 poshuk abonenta za indexom");
          printf("\n3 redaguv vubranogo zapuzu");
          printf("\n4 dodav novuh danuh u bazu");
          printf("\n5 vuved infom pro vsih korustuvachiv");
          printf("\n6 vudalen vubranoi infomazii");
                 printf("\n0.....Vyhid z programmy....\n");
          scanf("%d",&pp);
          switch (pp)
          {
              case 1: new_base(); break;
              case 2: searsh(f); break;
              case 3: redag(f); break;
              case 4: dodav(f); break;
              case 5: write(f); break;
              case 6: delet(f); break;
          }
                 
    }
    return 0;
}