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Copy pathStackUsingArray.cpp
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100 lines (89 loc) · 1.54 KB
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#include<stdio.h>
#include<iostream>
using namespace std;
class Stack
{
private:
int capacity;
int top;
int *ptr;
public:
Stack();
Stack(int);
Stack(Stack &);
Stack& operator=(Stack &);
void push(int);
int peek();
void pop();
bool isFull();
bool isEmpty();
~Stack();
};
Stack::Stack()
{
capacity = 0;
top = -1;
ptr = NULL;
}
Stack::Stack(int cap)
{
capacity = cap;
top = -1;
ptr = new int[cap];
}
Stack::Stack(Stack &d)
{
capacity = d.capacity;
top = d.top;
ptr = new int[capacity];
for(int i = 0; i<=top; i++)
ptr[i] = d.ptr[i];
}
Stack& Stack::operator=(Stack& d)
{
if(ptr != NULL)
delete [] ptr;
capacity = d.capacity;
top = d.top;
ptr = new int[capacity];
for(int i = 0; i<=top; i++)
ptr[i] = d.ptr[i];
return *this;
}
void Stack::push(int data)
{
if(isFull())
cout<<"Stack Overflow! Data cannot push.";
else
{
top++;
ptr[top] = data;
}
}
int Stack::peek()
{
if(isEmpty())
cout<<"Stack Underflow.";
else
return ptr[top];
}
void Stack::pop()
{
if(isEmpty())
cout<<"Stack Underflow";
else
top--;
}
bool Stack::isFull()
{
return (top == capacity-1);
}
bool Stack::isEmpty()
{
return (top == -1);
}
Stack::~Stack()
{
if(ptr != NULL)
delete [] ptr;
}