calculator.h

一个计算器程序

//MY HONOUR IS MY LIFE!
//FOR GLORY!
#include "stack"
using namespace std;
class calculator
{private:
  stack<char> optr;
  stack<double> opnd;
  double value;
 public:
	calculator(){ if(!optr.empty())optr.pop();
	              if(!opnd.empty())opnd.pop();
				  optr.push('#');};
	void run();//void evaluate();
	void clearS(){if(!optr.empty())optr.pop();
	             if(!opnd.empty())opnd.pop();
				  optr.push('#');};
 private:
	 bool istheta(char ch)const;
	 bool isA(char ch)const;
	 bool evaluate();
	 char get_command();
	 int lp(char op);
	 int rp(char op);
	 bool isop(char ch)const;
	 bool help();
	 double operate(char theta,double a,double b);
};