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Alogarithm steps:
Step 1: Create the stack class.
Step 2: Declare the constructor and destructor in the class
Step 3: Stack constructor definition.
Step 4: Stack destructor definition.
Step 5: Create the objects for the class stack. Objects automatically call the constructor for object initialization.
Step 6: Before program termination destructors are automatically called by compiler. It destroys the objects in memory.
CPP Program To Implement Constructor and Destructor
#include
#define SIZE 100
class stack
{
int stck[SIZE];
int tos;
public:
stack(); //constructor
~stack(); //destructor
void push(int i);
int pop();
};
//stack’s constructor function
stack :: stack()
{
tos=0;
cout<<”Stack Initialized\n”;
}
//stacks destructor function
stack :: ~stack()
{
cout<<”\Stack Destroyed”;
}
void stack :: push(int i)
{
if(tos==SIZE)
{
cout<<”Stack is full.\n”;
return;
}
stck[tos] = i;
tos++;
}
int stack :: pop ()
{
if(tos==0)
{
cout<<”Stack underflow.\n”;
return;
}
tos--;
return stck[tos];
}
int main()
{
stack a,b;
a. push(1);
b. push(2);
a. push(3);
b. push(4);
cout<
SAMPLE INPUT AND OUTPUT:
Stack Initialized
Stack Initialized
3 1 4 2
Stack Destroyed
Stack Destroyed
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