Stacks.cpp

#include <iostream>
using namespace std;
//implemenation of stacks using arrays. 
#define Max 20
class Stack{
    int stack[Max];
    int top = 0;
    public:
    void push(int value)
    {
        if(top == Max-1)
        {
        cout<<"Stack Overflow"<<"\n";
        return; 
        }  
        top++;
        stack[top] = value; 
       
    }
    int pop()
    {
        if(top == 0)
        {
            cout<<"Underflow"<<"\n";
            return -1;
        }
        int value  = stack[top];
        top--;
        return value;
    }
    int peek()
    {
        return stack[top];
    }
};
int main() {
    Stack s1; 
    s1.push(5);
    s1.push(6);
    s1.push(7);
    cout<<s1.pop()<<"\n";
    cout<<s1.peek()<<"\n";
    return 0;
}