//Stack.h

#ifndef STACK_H
#define STACK_H

const int DELTA = 5 ; // default growing size
class Stack {
	// Interface
	public:
		Stack() { init( DELTA ); }
		Stack( int in_size ) { init(in_size); }
		~Stack() {
			delete[] s;
		}
		int  nitems() { return count ; }
		bool full() { return (count==bufsize) ; }
		bool empty() { return (count==0) ; }

		void push( double c );
		double pop();
		void inspect();
		
		void grow( int delta );

	// Implementation
	private:
		void init( int in_size );

		double* s ;
		int count ;
		int bufsize ;
	
};
#endif