c++ primer plus 第十章答案
1.这个文件名不要在意。。懒得去新建。。
sale.h
#ifndef SALE_H_INCLUDED
#define SALE_H_INCLUDED
#include
class BankAccount
{
private:
std::string name;
int id;
double deposit;
public:
BankAccount(const std::string name_ = "Rail Gun",const int id_ = 0, double deposit_ = 0);
void show() const;
void input(double money);
void output(double money);
};
#endif // SALE_H_INCLUDED
#include
#include "sale.h"
using namespace std;
BankAccount::BankAccount(const string name_, const int id_, double deposit_)
{
name = name_;
id = id_;
deposit = deposit_;
}
void BankAccount::show() const
{
cout << "name : " << name << endl;
cout << "id: " << id << endl;
cout << "deposit: " << deposit << endl;
}
void BankAccount::input(double money)
{
deposit += money;
}
void BankAccount::output(double money)
{
if(deposit < money)
cout << "You have no enough money!" << endl;
else
deposit -= money;
}
#include
#include "sale.h"
int main()
{
BankAccount user1("Rail Gun", 111, 888);
user1.show();
user1.input(112);
user1.output(1111);
user1.show();
return 0;
}
2.头文件
#ifndef SALE_H_INCLUDED
#define SALE_H_INCLUDED
#include
class Person{
private:
static const int LIMIT = 25;
std::string lname;
char fname[LIMIT];
public:
Person(){lname = "";fname[0] = '\0';}
Person(const std::string & ln, const char * fn = "Heyyou");
void show() const;
void FormalShow() const;
};
#endif // SALE_H_INCLUDED
函数实现
#include
#include "sale.h"
#include
using namespace std;
Person::Person(const string & ln, const char * fn)
{
lname = ln;
strcpy(fname, fn);
}
void Person::show() const
{
cout << lname << ' ' << fname << endl;
}
void Person::FormalShow() const
{
cout << fname << ' ' << lname << endl;
}
main.cpp
#include
#include "sale.h"
int main()
{
Person one;
Person two("Smythecraft");
Person three("Dimwiddy", "Sam");
one.show();
one.FormalShow();
two.show();
two.FormalShow();
three.show();
three.FormalShow();
return 0;
}
3.golf.h
#ifndef GOLF_H_INCLUDED
#define GOLF_H_INCLUDED
const int Len = 40;
class golf
{
private:
char fullname[Len];
int handicap;
public:
golf(const char * name = "", int hc = 0);
int setgolf();
void Handicap(int hc);
void showgolf();
};
#endif // GOLF_H_INCLUDED
#include
#include "golf.h"
#include
using namespace std;
golf::golf(const char * name, int hc)
{
strcpy(fullname, name);
handicap = hc;
}
int golf::setgolf()
{
cout << "Please enter the fullname";
if(cin.getline(fullname,40) && strlen(fullname) != 0)
{
cout << "Please enter the number";
cin >> handicap;
cin.get();
return 1;
}
else
{
cout << "error";
return 0;
}
}
void golf::Handicap(int hc)
{
handicap = hc;
}
void golf::showgolf()
{
cout << fullname << ' ';
cout << handicap;
cout << endl;
}
#include
#include "golf.h"
using namespace std;
int main()
{
golf test;
if(!test.setgolf())
return 0;
golf otherone("hello world!", 3);
otherone.showgolf();
otherone.Handicap(888);
otherone.showgolf();
}
4.这个搞的是真的脑壳晕。。命名空间什么的类什么的都一毛一样。。main.cpp的写的什么不要太在意,我已经晕了T A T，头文件和实现倒是都改过来了_(:зゝ∠)_
sale.h
#ifndef SALE_H_INCLUDED
#define SALE_H_INCLUDED
namespace SALES
{
const int QUARTERS = 4;
class Sales
{
private:
double sales[QUARTERS];
double average;
double max;
double min;
public:
Sales(const double ar[], int n);
Sales();
void showSales() const;
};
}
#endif // SALE_H_INCLUDED
sale.cpp
#include "sale.h"
#include
using namespace std;
namespace SALES
{
Sales::Sales(const double ar[], int n)
{
int sum = 0;
int avg, max ,min;
for(int i = 0; i < n; i++)
{
sales[i] = ar[i];
sum += sales[i];
}
max = min = sales[0];
for(int i = 1; i < n; i++)
{
max = max > sales[i] ? max : sales[i];
min = min < sales[i] ? min : sales[i];
}
avg = sum / n;
}
Sales::Sales()
{
cout << "Please enter sales[i]" << endl;
double max = 999;
double min = -999;
double avg = 0;
for(int i = 0 ; i < 4 ; ++i)
{
cin >> sales[i];
max = max < sales[i] ? sales[i] : max;
min = min > sales[i] ? sales[i] : min;
avg += sales[i];
}
max = max;
min = min;
average = avg / 4;
}
void Sales::showSales() const
{
for(int i = 0 ; i < 4 ; ++i)
cout << sales[i] << endl;
cout << "MAX: " << max << endl << "MIN: " << min << endl << "AVG: " << average << endl;
}
}
main.cpp
#include
#include "sale.h"
int main()
{
double a[3] = {1.1, 2.2, 3.3};
SALES::Sales x(a, 3);
x.showSales();
SALES::Sales y;
y.showSales();
return 0;
}
5.
我明明昨天写着放这的，不见了！！！(>_<)MD，不写了,好不容易才写出来的啊！！！！！
6.test.h
#ifndef TEST_H_INCLUDED
#define TEST_H_INCLUDED
class Move
{
private:
double x;
double y;
public:
Move(double a = 0, double b = 0);
void showmove() const;
Move add(const Move & m) const;
void reset(double a = 0, double b = 0);
};
#endif // TEST_H_INCLUDED
#include "test.h"
#include
Move::Move(double a, double b)
{
x = a;
y = b;
}
void Move::showmove() const
{
std::cout << "X: " << x << std::endl;
std::cout << "Y: " << y << std::endl;
std::cout << "______________________________________" << std::endl;
}
Move Move::add(const Move & m) const
{
Move temp((*this).x + m.x, (*this).y + m.y);
return temp;
}
void Move::reset(double a, double b)
{
x = a;
y = b;
}
#include
#include "test.h"
int main()
{
Move emm(1, 2);
emm.showmove();
Move aha(2, 1);
aha.showmove();
emm.add(aha).showmove();
emm.reset(8, 8);
emm.showmove();
return 0;
}
7.test.h
#ifndef TEST_H_INCLUDED
#define TEST_H_INCLUDED
class Plorg{
private:
char name[19];
int CI;
public:
Plorg();
void changePlorg(char *name_, int CI_);
void showPlorg();
};
#endif // TEST_H_INCLUDED
#include
#include "test.h"
#include "cstring"
Plorg::Plorg()
{
strcpy(name, "Plorg");
CI = 50;
}
void Plorg::changePlorg(char *name_, int CI_)
{
strcpy(name,name_);
CI = CI_;
}
void Plorg::showPlorg()
{
std::cout << name << ' ' << CI << std::endl;
}
#include
#include "test.h"
int main()
{
Plorg a;
a.showPlorg();
a.changePlorg("T_T",666);
a.showPlorg();
return 0;
}