第10章第1题

bank.h

#ifndef BANK_H_
#define BANK_H_
#include<string>
class bank
{
  enum { Len = 6 };  //账号为固定6
 private:
  std::string name;
  char account[Len];
  double me;
 public:
  bank(const std::string& nm = "默认账户", const char* ac = "000000", double y =0);
  ~bank();
  void inBank(double y);
  void outBank(double y);
  void show()const;
};
#endif  

bank.cxx

#include<iostream>
#include<cstring>
#include"bank.h"
bank::bank(const std::string& nm , const char* ac , double y)
{
  name = nm;
  strcpy(account,ac);
  me = y;
}
bank::~bank()
{
}
void bank::inBank(double y)
{
  me += y;
}
void bank::outBank(double y)
{
  me -= y;
}
void bank::show()const
{
  std::cout<<"姓名:"<<name<<std::endl;
  std::cout<<"账号:"<<account<<std::endl;
  std::cout<<"账户余额:"<<me<<std::endl;
}

main.cxx

#include<iostream>
#include"bank.h"
int main()
{
  bank A;
  A.show();
  std::string name = "White";
  char acc[6] = {'1','2','3','4','5','6'};
  double m = 150.5;
  bank B(name,acc,m);
  B.show();
  std::cout<<"账户存入10.1元.\n";
  B.inBank(10.1);
  std::cout<<"账户提取9.9元.\n";
  B.outBank(9.9);
  B.show();
}