Stack Implementation Using Array.cpp

// Stack class.
class Stack {
    
public:
    int Top;
    int* arr;
    int capacity;
    Stack(int capacity) {
        // Write your code here.
        this->capacity=capacity;
        arr= new int[capacity];
        Top=-1;
    } 

    void push(int num) {
        // Write your code here.
        if(isFull())
            return ;

        Top++;
        arr[Top]= num;
    }

    int pop() {
        // Write your code here.
        if(isEmpty())
            return -1;
        int val=arr[Top];
        Top--;
        return val;
    }
    
    int top() {
        // Write your code here.
        if(isEmpty())
            return -1;
        else
            return arr[Top];
    }
    
    int isEmpty() {
        // Write your code here.
        if(Top==-1)
            return 1;
        else
            return 0;
    }
    
    int isFull() {
        // Write your code here.
        if(Top==capacity-1)
            return 1;
        else
            return 0;
    }
    
};