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目录

1.面向对象程序设计要点

面向对象程序设计要注意什么：

2.单使用封装性的例子

单使用封装性的面向对象程序设计：

运行截图如下：

源码如下：

Operation.h

#include 
   
    #include 
    
     #include 
     
      using namespace std;class Operation{public:	static double getResult(double numberA, double numberB, string operate){		double result = 0.0;		enum operation		{			addOper,			subOper,			mulOper,			divOper		};		if(operate.compare("+") == 0){			result = numberA + numberB;		}		else if(operate.compare("-") == 0){			result = numberA - numberB;		}		else if(operate.compare("*") == 0){			result = numberA * numberB;		}		else if(operate.compare("/") == 0){						if(abs(numberB) < 0.0001)				throw "Division by zero condition!";			result = numberA / numberB;		}		else{			throw "The operator is wrong!";		}		return result;	}};
     
    
   

main.cpp

#include "Operation.h"int main(){	try{		double numberA, numberB;		string opera;		cout << "请输入数字A:";		cin >> numberA;		cout << "输入运算符（+、-、*、/）:";		cin >> opera;		cout << "请输入数字B：";		cin >> numberB;				double result = Operation::getResult(numberA, numberB, opera);		cout << result << endl;	}	catch(const char *msg){		cout << "error informaiton:" << msg <

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