stack.c

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

struct aStack{
  int value;
  int stack[SIZE];
  int pointer;
  int aBP;
};

struct aStack *makeStack(){
  struct aStack *a = malloc(sizeof(struct aStack));
  a->value = 0;
  a->pointer = 0;
  a->aBP = 0;
  return a;
}

void ptr_decrease(struct aStack *a){
  a->pointer -=1;
}

int get_value(struct aStack *a){
  return a->stack[a->pointer];
}

void add_value(struct aStack *a){
  a->pointer+=1;
  if(a->pointer >= SIZE){
    fprintf(stderr,"stack full\n");
    exit(1);
  }
  a->stack[a->pointer] = a->value;
  a->value +=1;
}

void BP(struct aStack *a){
  a->aBP = 1;
}

int isBP(struct aStack *a){
  return a->aBP;
}