Ex2 Tad

#include <stdio.h>
#include <stdlib.h>
#include "pila.h"

void estaBalanceado(TStack *stack);

int main(){

    TStack stack;
    char letra;
    initStack(&stack);
    while(scanf("%c",&letra)!= EOF){
        push(&stack,letra);
        printf("%c",letra);
    }
    estaBalanceado(&stack);

    return 0;
}

void estaBalanceado(TStack *stack){
    TNode *elem = stack->top;
    char letra;
    int count1=0, count2=0, ok = 1;
    //printf("Hola\n");
    while(elem != NULL){
        letra = elem -> value;
        if(letra == ')')
            count1++;
        if(letra == '(')
            if(count1 == 0){
                ok = 0;
            }else{
                count1--;
            }
        if(letra == ']')
            count2++;
        if(letra == '[')
            if(count2 == 0){
                ok = 0;
            }else{
                count2--;
            }
        pop(stack);
        elem = stack -> top;
    }
    if(count1==0 && count2==0 && ok)
        printf(" --> ES CORRECTA\n");
    else
        printf(" --> NO ES CORRECTA\n");
}