stack.h

顺序栈

typedef char Stack_entry;
enum Error_code {success,overflow,underflow};

const int maxstack=10;

class aStack 
{
public:
	aStack();
	bool empty() const;
	Error_code pop();
	Error_code top(Stack_entry&item) const;
	Error_code push(const Stack_entry&item);
private:
	int count;
	Stack_entry entry[maxstack];        
};