Initial commit

c++/Others/Implementing Stack using Class (with constructor e.cpp

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+Implementing Stack using Class (with constructor etc).
+
+# include<iostream.h>
+# include<conio.h>
+# define SIZE 20
+
+class stack
+{
+int a[SIZE];
+int tos; // Top of Stack
+public:
+	stack();
+	void push(int);
+	int pop();
+	int isempty();
+	int isfull();
+};
+stack::stack()
+{
+tos=0; //Initialize Top of Stack
+}
+
+int stack::isempty()
+{
+return (tos==0?1:0);
+}
+int stack::isfull()
+{
+return (tos==SIZE?1:0);
+}
+
+void stack::push(int i)
+{
+
+if(!isfull())
+{
+cout<<"Pushing "<<i<<endl;
+a[tos]=i;
+tos++;
+}
+else
+{
+ cerr<<"Stack overflow error !
+Possible Data Loss !";
+}
+}
+int stack::pop()
+{
+if(!isempty())
+{
+cout<<"Popping "<<a[tos-1]<<endl;
+return(a[--tos]);
+}
+else
+{
+cerr<<"Stack is empty! What to pop...!";
+}
+return 0;
+}
+
+void reverse(stack s)
+{
+stack s2;
+while(!s.isempty())
+{
+	s2.push(s.pop());
+}
+cout<<"Reversed contents of the stack..."<<endl;
+while(!s2.isempty())
+{
+	cout<<s2.pop()<<endl;
+}
+}//end of fn.
+void main()
+{
+clrscr();
+stack s;
+
+s.push(1);
+s.push(2);
+s.push(3);
+
+reverse(s);
+getch();
+}