Initial commit

c++/Others/Stack implementation as a class.cpp

@@ -0,0 +1,103 @@
+Stack implementation as a class
+
+# include<iostream.h>
+# include<process.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())
+{
+a[tos]=i;
+tos++;
+}
+else
+{
+ cerr<<"Stack overflow error !
+Possible Data Loss !";
+}
+}
+int stack::pop()
+{
+if(!isempty())
+{
+return(a[--tos]);
+}
+else
+{
+cerr<<"Stack is empty! What to pop...!";
+}
+return 0;
+}
+
+void main()
+{
+stack s;
+int ch=1,num;
+while(ch!=0)
+{
+	cout<<"Stack Operations Mani Menu
+1.Push
+2.Pop
+3.IsEmpty
+4.IsFull
+0.Exit
+
+";
+	cin>>ch;
+	switch(ch)
+	{
+	case 0:
+		exit(1); //Normal Termination of Program
+	case 1:
+		cout<<"Enter the number to push";
+		cin>>num;
+		s.push(num);
+		break;
+	case 2:
+		cout<<"Number popped from the stack is: "<<s.pop()<<endl;
+		break;
+	case 3:
+		(s.isempty())?(cout<<"Stack is empty.
+"):(cout<<"Stack is not empty.
+");
+		break;
+	case 4:
+		(s.isfull())?(cout<<"Stack is full.
+"):(cout<<"Stack is not full.
+");
+		break;
+	default:
+		cout<<"Illegal Option.
+Please try again
+";
+	}
+}//end of while
+getch();
+}