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stack_a.cpp
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#include <iostream>
#include <stdexcept>
#include "stack_a.h"
using namespace std;
Stack_A::Stack_A()
{
size = 0;
}
void Stack_A::push(int data)
{
if (size == 1024)
{
throw runtime_error("Stack Full");
}
else
{
stk[size] = data;
size += 1;
}
}
int Stack_A::pop()
{
if (size == 0)
{
throw runtime_error("Empty Stack");
}
else
{
size -= 1;
return stk[size];
}
}
int Stack_A::get_element_from_top(int idx)
{
if (idx > size - 1)
{
throw runtime_error("Index out of range");
}
else
{
return stk[size - 1 - idx];
}
}
int Stack_A::get_element_from_bottom(int idx)
{
if (idx > size - 1)
{
throw runtime_error("Index out of range");
}
else
{
return stk[idx];
}
}
void Stack_A::print_stack(bool top_or_bottom)
{
if (top_or_bottom == 1)
{
for (int i = size - 1; i >= 0; i--)
{
cout << stk[i] << "\n";
}
}
else
{
for (int i = 0; i < size; i++)
{
cout << stk[i] << "\n";
}
}
}
int Stack_A::add()
{
if (size < 2)
{
throw runtime_error("Not Enough Arguments");
}
else
{
int a = pop(), b = pop();
int c = a + b;
push(c);
return c;
}
}
int Stack_A::subtract()
{
if (size < 2)
{
throw runtime_error("Not Enough Arguments");
}
else
{
int a = pop(), b = pop();
int c = b - a;
push(c);
return c;
}
}
int Stack_A::multiply()
{
if (size < 2)
{
throw runtime_error("Not Enough Arguments");
}
else
{
int a = pop(), b = pop();
int c = a * b;
push(c);
return c;
}
}
int Stack_A::divide()
{
if (size < 2)
{
throw runtime_error("Not Enough Arguments");
}
else
{
if (stk[size - 1] == 0)
{
throw runtime_error("Divide by Zero Error");
}
else
{
int a = pop(), b = pop();
if ((a < 0 && b > 0) || (a > 0 && b < 0))
{
int c = b / a;
c -= 1;
push(c);
return c;
}
else
{
int c = b / a;
push(c);
return c;
}
}
}
}
int *Stack_A::get_stack()
{
return stk;
}
int Stack_A::get_size()
{
return size;
}