#include<stdlib.h>
#include<stdio.h>
#include<string.h>

typedef struct centrale {
    int pret, suprafata;
    char *producator;
}b;

void adaugare_element(b *a, int *n)
{
    char aux[20];
    (*n)++;
    printf("Producator: ");
    scanf("%s", aux);
    (a + *n)->producator = (char*)malloc(strlen(aux) + 1);
    strcpy((a + *n)->producator, aux);
    printf("Suprafata: ");
    scanf("%d", &((a + *n)->suprafata));
    printf("Pret: ");
    scanf("%d", &((a + *n)->pret));
}

void afisare(b *a, int *n)
{
    b *aux;
    int i;
    printf("\n");
    for (i = 0; i < *n; i++)
    {
        *(a + i) = *(a + i+1);
    }
    (*n)--;
    for (i = 0; i <= *n; i++)
    {
        printf("Producator: %s\nSuprafata: %d\nPret: %d\n\n", (a + i)->producator, (a + i)->suprafata, (a + i)->pret);
    }
}

void afisare_biti(b *a, int n)
{
    int i,j, nr = 0;
    for (i = 0; i <= n; i++)
    {
        for (j = 7; j >= 0; j--)
        {
            if ((a + i)->suprafata >> j & 1)
            {
                printf("1");
                nr++;
            }
            else
                printf("0");
        }
        printf("\n");
    }
    printf("Numarul de biti 1 este: %d\n", nr);
}

int main()
{
    b a[20];
    int n = -1;
    enum{iesire,adaugare,stergere,biti}opt;
    do {
        printf("0. Iesire\n");
        printf("1. Adaugare\n");
        printf("2. Stergere\n");
        printf("3. Biti\n");
        printf("opt= ");
        scanf("%d", &opt);
        switch (opt)
        {
        case iesire:exit(0);
            break;
        case adaugare:adaugare_element(a, &n);
            break;
        case stergere:afisare(a, &n);
            break;
        case biti:afisare_biti(a, n);
            break;
        default:printf("Eroare!\n");
            break;
        }
    } while (1);
}