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#include<stdio.h> | |
class Stack | |
{ | |
private: | |
class node | |
{ | |
public: | |
int data; | |
node *next; | |
node() | |
{ | |
next=NULL; | |
} | |
}*Head; | |
int Size; | |
public: | |
Stack(); | |
void insert(int n); | |
int top(); | |
void pop(); | |
int size(); | |
}; | |
Stack::Stack() | |
{ | |
Head=NULL; | |
Size=0; | |
} | |
void Stack::insert(int n) | |
{ | |
Size++; | |
node *temp; | |
temp =new node; | |
temp->data=n; | |
if(Head==NULL) | |
{ | |
temp->next=NULL; | |
Head=temp; | |
return; | |
} | |
temp->next=Head; | |
Head=temp; | |
} | |
int Stack::top() | |
{ | |
return Head->data; | |
} | |
void Stack::pop() | |
{ | |
Size--; | |
node *temp=Head; | |
Head=Head->next; | |
delete(temp); | |
} | |
int Stack::size() | |
{ | |
return Size; | |
} | |
int main() | |
{ | |
Stack stk; | |
stk.insert(2); | |
stk.insert(19); | |
printf("%d\n",stk.size()); | |
printf("%d\n",stk.top()); | |
stk.pop(); | |
printf("%d\n",stk.top()); | |
return 0; | |
} |
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