Stack dengan ops

#include // for sleep()
#include // for I/0
#include // for MessageBox() API
#include


#define MAX 10 // MAXIMUM STACK CONTENT


template // Using Templates so that any type of data can be
// stored in Stack without multiple defination of class
class stack
{


protected:


T arr[MAX]; // Contains all the Data


public:
T item,r;
int top; //Contains location of Topmost Data pushed onto Stack
stack() //Constructor
{
for(int i=0;i {
arr[i]=NULL; //Initialises all Stack Contents to NULL
}


top=-1; //Sets the Top Location to -1 indicating an empty stack
}


void push(T a) // Push ie. Add Value Function
{
top++; // increment to by 1
if(top {
arr[top]=a; //If Stack is Vacant store Value in Array
}
else // Bug the User
{
MessageBox(0,"STACK IS FULL","STACK WARNING!",MB_ICONSTOP);
top--;
}
}


T pop() // Delete Item. Returns the deleted item
{
if(top==-1)
{
MessageBox(0,"STACK IS EMPTY\n","WARNING",MB_ICONSTOP);
return NULL;
}
else
{
T data=arr[top]; //Set Topmost Value in data
arr[top]=NULL; //Set Original Location to NULL
top--; // Decrement top by 1
return data; // return deleted item
}
}
};



void main()
{
stack a; // Create object of class a with int Template
int opt=1;
while (opt!=3)
{
clrscr();
cout<<"PATIHAN ARDI M\n";
cout<<"1A/14\n";
cout<<"0731140050\n\n\n";
cout<<" MAX STACK CAPACITY="<<((MAX-a.top)-1)<<"\n\n\n\n";
cout<<"1) Push Item\n";
cout<<"2) Pop Item\n";
cout<<"3) Exit\n\n";
cout<<"Option?";
cin>>opt;
switch(opt)
{
case 1:
cout<<"Which Number should be pushed?";
cin>>a.item;
a.push(a.item);
break;


case 2:
a.r=a.pop();
cout<<"Item popped from Stack is:"< break;
}
}
}