expresie10

#include <fstream>
#include <cstring>
using namespace std;
char exp[201];
int paranteze,valexp,calcexp[201],elc=1,nr;

int main()
{
    ifstream f("expresie10.in");
    f.getline(exp,201);
    f.close();
    calcexp[0]=-1;
    int i;
    for(i=0;exp[i];++i)
        if(paranteze>=0)
        {
            if(exp[i]=='[')
            {
                ++paranteze;
                calcexp[elc++]=-1;
                if(exp[i+1]==']') /// Daca parantezele nu contin un numar, iesim din for
                    break;
            }
            else
                if(exp[i]==']')
                {
                    --paranteze;
                    valexp=0;
                    while(calcexp[elc]!=-1)
                        valexp+=calcexp[elc],calcexp[elc--]=0;
                    calcexp[elc++]=valexp/2;
                }
                else /// Daca elementul este o cifra
                {
                    if(exp[i-1]!='[') /// Daca numarul nu este precedat de paranteza deschisa
                        break;
                    nr=0;
                    while(exp[i]>='0'&&exp[i]<='9') /// Calculez numarul
                        nr=nr*10+exp[i++]-'0';
                    if(exp[i--]!=']') /// Daca dupa numar nu urmeaza paranteza inchisa
                        break;
                    calcexp[elc]=nr;
                }
        }
    ofstream g("expresie10.out");
    if(paranteze==0&&!exp[i])
    {
        valexp=0;
        while(calcexp[elc]!=-1)
            valexp+=calcexp[elc--];
        g<<valexp;
    }
    else
        g<<"expresie gresita";
    g.close();
    return 0;
}