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

typedef struct centrale {
    int pret;
    char producator[50], suprafata_de_incalzit[50];
}b;

void adaugarere(b *a, int *n)
{
    int i;
    (*n)++;
    printf("Producator: ");
    scanf("%s", (a + *n)->producator);
    printf("Suprafata de incalzit: ");
    scanf("%s", (a + *n)->suprafata_de_incalzit);
    (a + *n)->pret = 0;
    for (i = 0; i < strlen((a + *n)->producator); i++)
        if ((a + *n)->producator[i] >= 'A' && (a + *n)->producator[i] <= 'Z')
            (a + *n)->pret += (a + *n)->producator[i];
}

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

void inversare(b*a, int n)
{
    int i,j;
    char *aux;
    for (i = 0; i <= n; i++)
    {
        aux = (char*)malloc(strlen((a + i)->suprafata_de_incalzit) + 1);
        for (j = strlen((a + i)->suprafata_de_incalzit)-1; j >= 0; j--)
            aux[strlen((a + i)->suprafata_de_incalzit)-j-1] = (a + i)->suprafata_de_incalzit[j];
        aux[strlen((a + i)->suprafata_de_incalzit)] = '\0';
        printf("%s\n", aux);
        free(aux);
    }
}

int main()
{
    b a[20];
    int n = -1;
    enum { iesire, adaugare, stergere, invers }opt;
    do {
        printf("0. Iesire\n");
        printf("1. Adaugarea unei noi centrale\n");
        printf("2. Stergere ultima centrala\n");
        printf("3. Afisare inversul suprafetei de incalzit\n");
        printf("opt= ");
        scanf("%d", &opt);
        switch (opt)
        {
        case iesire:exit(0);
            break;
        case adaugare:adaugarere(a, &n);
            break;
        case stergere:afisare(a, &n);
            break;
        case invers:inversare(a, n);
            break;
        default:
            break;
        }
    } while (1);
    system("pause");
    return 0;
}