C++primer plus第六版课后编程题答案10.1

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bank.h

#ifndef bank_H_#define bank_H_#include <string>using namespace std;class Bank{private:string name;string account;double money;void setIn(double in){money+=in;};void setOut(double out){money-=out;};double getMoney(){return money;};public:Bank(string n,string a,double m);~Bank();//void show(const bank &b);void in(double input);void out(double output);friend ostream&operator<<(ostream &os,const Bank &b);//友元函数};#endif

bank.cpp

#include <iostream>#include "bank.h"Bank::Bank(string n,string a,double m){name=n;//怎么第一次编译老是提示我构造函数不能有返回值?account=a;money=m;std::cout<<"\nBankaccount success!"<<endl;}/*Bank::Bank(string n,string a,double m){name=n;account=a;money=m;std::cout<<"Success!"<<endl;}*/Bank::~Bank(){std::cout<<"\nBankaccount recevory!"<<endl;}void Bank::in(double input){Bank::setIn(input);}void Bank::out(double output){if(Bank::getMoney()>0)Bank::setOut(output);else std::cout<<"\nYour have not enough money!"<<endl;}std::ostream &operator<<(ostream &os,const Bank &b)//重载<<运算符{os<<"\nshow start!"<<endl;os<<"name:"<<b.name<<"  account:"<<b.account<<endl;os<<"money:"<<b.money<<endl;return os;}

main101.cpp

#include <iostream>#include "bank.h"using namespace std;void main101(){{//将其加入代码块是为了更好地查看对象的销毁过程Bank b1=Bank("guang","a1",100);Bank b2=Bank("jing","a2",600.5);cout<<b1<<endl;cout<<b2<<endl;//b1.money=200;b1.in(100);cout<<b1<<endl;b1.out(5.5);cout<<b1<<endl;}system("pause");}

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