C++PrimerPlus学习——第十四章编程练习
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C++PrimerPlus学习——第十四章编程练习
小編覺得挺不錯的,現在分享給大家,幫大家做個參考.
14-1
參考14.19
winec.h
winec.cpp
#include <iostream> #include <string> #include "winec.h" using std::cout; using std::cin; using std::endl;Wine::Wine(const char* l, int y, const int yr[], const int bot[]) {fullname = l;yrs = y;pa.Set(ArrayInt(yr, yrs), ArrayInt(bot, yrs)); }Wine::Wine(const char* l, int y) {fullname = l;yrs = y; }Wine::Wine() {fullname = "None wine";yrs = 0; }void Wine::GetBottles() {cout << "Enter " << fullname << " for " << yrs << " year(s):\n";ArrayInt yr(yrs), bt(yrs);for (int i = 0; i < yrs; i++){cout << "Enter the year: ";cin >> yr[i];cout << "Enter the bottles: ";cin >> bt[i];}while (cin.get() != '\n')continue;pa.Set(yr, bt); }string Wine::Label() {return fullname; }int Wine::sum() {return pa.Sum(); }void Wine::Show() {cout << "Wine: " << fullname << endl;cout << "\tyear\tbottles" << endl;pa.Show(yrs); }main.cpp
#include <iostream> #include "winec.h"int main( void ) {using std::cin;using std::cout;using std::endl;cout << "Enter name of wine: ";char lab[50];cin.getline(lab, 50);cout << "Enter number of years: ";int yrs;cin >> yrs;Wine holding(lab, yrs);holding.GetBottles();holding.Show();const int YRS = 3;int y[YRS] = { 1993,1995,1998 };int b[YRS] = { 48,60,72 };Wine more("Gushing Grape Red", YRS, y, b);more.Show();cout << "Total bottles for " << more.Label()<< ": " << more.sum() << endl;cout<<"Bye\n";return 0; }14-2
參考14.19和14.4
winec.h
winec.cpp
#include <iostream> #include <string> #include "winec.h" using std::cout; using std::cin; using std::endl;Wine::Wine(const char* l, int y, const int yr[], const int bot[]):string(l), PairArray(ArrayInt(yr,y),ArrayInt(bot,y)) {fullname = l;yrs = y; }Wine::Wine(const char* l, int y):string(l),PairArray(ArrayInt(y), ArrayInt(y)) {fullname = l;yrs = y; }Wine::Wine():string("Null"), PairArray(ArrayInt(0, 0), ArrayInt(0, 0)) {fullname = "Null";yrs = 0; }void Wine::GetBottles() {cout << "Enter " << fullname << " for " << yrs << " year(s):\n";ArrayInt yr(yrs), bt(yrs);for (int i = 0; i < yrs; i++){cout << "Enter the year: ";cin >> yr[i];cout << "Enter the bottles: ";cin >> bt[i];}while (cin.get() != '\n')continue;PairArray::Set(yr, bt); }string Wine::Label() {return (const std::string&) * this; }int Wine::sum() {return PairArray::second().sum(); }void Wine::Show() {cout << "Wine: " << (const string)*this << endl;cout << "\tYear\tBotteles" << endl;for (int i = 0; i < yrs; ++i)cout << "\t" << PairArray::first()[i] << "\t" << PairArray::second()[i] << endl; }14-3
vs2019，有個問題，char* Singer::pv[Singer::Vtypes] = { “other”, “alto”, “contralto”, “soprano”, “bass”, “baritone”, “tenor” };，會報錯const char 類型的值不能用于初始化char* 類型的實體。
網上搜索別人的答案，復制粘貼到里面，也提示有這個錯誤。
網上搜索發現解決方法是項目->屬性->C/C+±>語言->符合模式，將符合模式由是改為否，確實有用。
想了想，這大概是因為把char[] 賦值給了char*，雖然差不多，但是編譯器不允許？于是就有一個笨辦法，先聲明一個char temp[]類型，再把數組名賦值給pv里面的指針，這樣就是把char賦值給char了，也不會報錯。
char temp1[] = “other”;
char temp2[] = “alto”;
char temp3[] = “contralto”;
char temp4[] = “soprano”;
char temp5[] = “bass”;
char temp6[] = “baritone”;
char temp7[] = “tenor”;
char* Singer::pv[Singer::Vtypes] = { temp1, temp2, temp3, temp4, temp5, temp6, temp7 };
QueueTp.h
#ifndef QUEUETP_H_ #define QUEUETP_H_template <typename T> class QueueTp { private:static const int LEN = 10;T* listHead;T* listTail;T* data; public:QueueTp(int len = LEN) { data = new T[len]; listHead = listTail = data; }~QueueTp() { delete[] data; }bool enQueue(const T& item);bool deQueue(T& item);T newQueue() const { return *(listTail - 1); }bool isFull() const { return listTail == data + sizeof(data); }bool isEmpty() const { return listTail == listHead; } };template <typename T> bool QueueTp<T>::enQueue(const T& item) {if (isFull())return false;*listTail = item;listTail++;return true; }template <typename T> bool QueueTp<T>::deQueue(T& item) {if (isFull())return false;item = *listHead;listHead++;return true; }#endif // !QUEUETP_H_workermi.h
#ifndef WORKERMI_H_ #define WORKERMI_H_#include <string>class Worker { private:std::string fullname;long id; protected:virtual void Data() const;virtual void Get(); public:Worker() : fullname("no one"), id(0L) {}Worker(const std::string& s, long n) :fullname(s), id(n) {}virtual ~Worker() = 0;virtual void Set() = 0;virtual void Show() const = 0; };class Waiter :virtual public Worker { private:int panache; protected:void Data() const;void Get(); public:Waiter() :Worker(), panache(0) {}Waiter(const std::string& s, long n, int p = 0) :Worker(s, n), panache(p) {}Waiter(const Worker& wk, int p = 0) :Worker(wk), panache(p) {}void Set();void Show() const; };class Singer :virtual public Worker { protected:enum { other, alto, contralto, soprano, bass, baritone, tenor };enum { Vtypes = 7 };void Data() const;void Get(); private:static char* pv[Vtypes];int voice; public:Singer() :Worker(), voice(other) {}Singer(const std::string& s, long n, int v = other) :Worker(s, n), voice(v) {}Singer(const Worker& wk, int v = other) :Worker(wk), voice(v) {}void Set();void Show() const; };class SingingWaiter :public Singer, public Waiter { protected:void Data() const;void Get(); public:SingingWaiter() {}SingingWaiter(const std::string& s, long n, int p = 0, int v = other) :Worker(s, n), Waiter(s, n, p), Singer(s, n, v) {}SingingWaiter(const Worker& wk, int p = 0, int v = other) :Worker(wk), Waiter(wk, p), Singer(wk, v) {}SingingWaiter(const Worker& wt, int v = other) :Worker(wt), Waiter(wt), Singer(wt, v) {}SingingWaiter(const Singer& wt, int p = 0) :Worker(wt), Waiter(wt, p), Singer(wt) {}void Set();void Show() const; }; #endif // !WORKERMI_H_workermi.cpp
#include "workermi.h" #include <iostream>using std::cout; using std::cin; using std::endl;Worker::~Worker() {}void Worker::Data() const {cout << "Name: " << fullname << endl;cout << "Employee ID: " << id << endl; }void Worker::Get() {getline(cin, fullname);cout << "Enter worker's ID: ";cin >> id;while (cin.get() != '\n')continue; }void Waiter::Set() {cout << "Enter waiter's name: ";Worker::Get();Get(); }void Waiter::Show() const {cout << "Category: waiter\n";Worker::Data();Data(); }void Waiter::Data() const {cout << "Panache rating: " << panache << endl; }void Waiter::Get() {cout << "Enter waiter's panache rating: ";cin >> panache;while (cin.get() != '\n')continue; }char temp1[] = "other"; char temp2[] = "alto"; char temp3[] = "contralto"; char temp4[] = "soprano"; char temp5[] = "bass"; char temp6[] = "baritone"; char temp7[] = "tenor"; char* Singer::pv[Singer::Vtypes] = { temp1, temp2, temp3, temp4, temp5, temp6, temp7 };void Singer::Set() {cout << "Enter singer's name: ";Worker::Get();Get(); }void Singer::Show() const {cout << "Category: singer\n";Worker::Data();Data(); }void Singer::Data() const {cout << "Vocal range: " << pv[voice] << endl; }void Singer::Get() {cout << "Enter number for singer's vocal range:\n";int i;for (i = 0; i < Vtypes; i++){cout << i << ": " << pv[i] << " ";if (i % 4 == 3)cout << endl;}if (i % 4 != 0)cout << endl;cin >> voice;while (cin.get() != '\n')continue; }void SingingWaiter::Data() const {Singer::Data();Waiter::Data(); }void SingingWaiter::Get() {Waiter::Get();Singer::Get(); }void SingingWaiter::Set() {cout << "Enter singing waiter's name: ";Worker::Get();Get(); }void SingingWaiter::Show() const {cout << "Category: singing waiter\n";Worker::Data();Data(); }main.cpp
#include <iostream> #include <cstring> #include "workermi.h" #include "queuetp.h"int main() {using std::cin;using std::cout;using std::endl;using std::strchr;QueueTp<Worker*> lolas;int ct;while(!lolas.isFull()){char choice;cout << "Enter the employee category:\n"<< "w: waiter s:singer "<< "t: singing waiter q: quit\n";cin >> choice;while (strchr("wstq", choice) == NULL){cout << "Please enter a w, s, t, or q: ";cin >> choice;}if (choice == 'q')break;switch (choice){case 'w': lolas.enQueue(new Waiter);break;case 's':lolas.enQueue(new Singer);break;case 't':lolas.enQueue(new SingingWaiter);break;}cin.get();lolas.newQueue()->Set();}cout << "\nHere is your staff:\n";Worker* wrk;while(!lolas.isEmpty()){lolas.deQueue(wrk);cout << endl;wrk->Show();delete wrk;}cout << "Bye.\n";return 0; }14-4
Person.h
Person.cpp
#include "Person.h" #include<iostream> #include<string> using std::string; using std::cout; using std::endl; using std::cin;Person::~Person() {}void Person::Data() const {cout << "Firstname: " << firstname << endl;cout << "Lastname: " << lastname << endl; }void Person::Get() {cout << "Enter person's firstname:";getline(cin, firstname);cout << "Enter person's lastname:";getline(cin, lastname); }void Gunslinger::Data() const {cout << "Time: " << endl;cout << "Num of scotch: " << endl; }void Gunslinger::Get() {cout << "Please enter time: " << endl;cin >> time;cout << "Please enter num of scotch: " << endl;cin >> num;while (cin.get() != '\n')continue; }void Gunslinger::Set() {Person::Get();Get();cout << endl; }void Gunslinger::Show() const {cout << "Category:Gunslinger\n";Person::Data();Data(); }void PokerPlayer::Data() const {cout << "Card: " << card; }void PokerPlayer::Get() {cout << "Please enter card: " << endl;cin >> card;while (cin.get() != '\n')continue; }void PokerPlayer::Set() {Person::Get();Get();cout << endl; }void PokerPlayer::Show() const {cout << "Gategory: PokerPlayer\n";Person::Data();Data(); }void BadDude::Data() const {Gunslinger::Data();PokerPlayer::Data(); }void BadDude::Get() {Gunslinger::Get();PokerPlayer::Get(); }void BadDude::Set() {Person::Get();Get();cout << endl; }void BadDude::Show() const {Person::Data();Data(); }main.cpp
#include <iostream> #include <cstring> #include "Person.h" #include "QueueTp.h"const int SIZE = 5;int main() {using std::cin;using std::cout;using std::endl;using std::strchr;Person* lolas[SIZE];int ct;int number = 1;for (ct = 0; ct < SIZE; ct++) {char choice;cout << "[ Enter the employee category: ]\n"<< "g: Gunslinger p: PokerPlayer "<< "b: BadDude q: quit\n";cin >> choice;while (strchr("gpbq", choice) == NULL) {cout << "Please enter a g, p, b, or q: ";cin >> choice;}if ('q' == choice)break;number += 5;switch (choice) {case 'g': lolas[ct] = new Gunslinger("Guns", "Linger", number, 3);break;case 'p': lolas[ct] = new PokerPlayer("Poker", "Player",2);break;case 'b': lolas[ct] = new BadDude("Bad", "Dude", number, 5);break;}cin.get();}cout << "\nHere is your staff:\n";int i;for (i = 0; i < ct; i++) {cout << endl;lolas[i]->Show();}for (i = 0; i < ct; i++)delete lolas[i];BadDude* badd = new BadDude("Bad", "Dude", number, 12);cout << "Draw time：" << badd->Gdraw() << endl;cout << "Next card：" << badd->Cdraw() << endl;delete badd;cout << "Bye.\n";return 0; }14-5
頭文件和主函數都是和書上一樣的
emp.h
emp.cpp
#include <iostream> #include <string> #include "emp.h" using std::cout; using std::cin; using std::endl;abstr_emp::~abstr_emp() {}abstr_emp::abstr_emp() {fname = "Null";lname = "Null";job = "Null"; }abstr_emp::abstr_emp(const std::string& fn, const std::string& ln, const std::string& j) {fname = fn;lname = ln;job = j; }void abstr_emp::ShowAll() const {cout << "Fullname: " << fname << endl;cout << "Lastname: " << lname << endl;cout << "Job: " << job << endl; }void abstr_emp::SetAll() {cout << "Enter firstname: ";cin >> fname;cout << "Enter lastname: ";cin >> lname;cout << "Ente job: ";cin.get();getline(cin, job); }std::ostream& operator<<(std::ostream& os, const abstr_emp& e) {cout << e.fname << " " << e.lname << " " << e.job << endl;return os;// TODO: 在此處插入 return 語句 }employee::employee():abstr_emp() { }employee::employee(const std::string& fn, const std::string& ln, const std::string& j):abstr_emp(fn, ln, j) { }void employee::ShowAll() const {abstr_emp::ShowAll(); }void employee::SetAll() {abstr_emp::SetAll(); }void manager::Data() const {cout << "Inchargeof: " << inchargeof << endl; }void manager::Get() {cout << "Enter Inchargeof: ";cin >> inchargeof; }manager::manager():abstr_emp() {inchargeof = 0; }manager::manager(const std::string& fn, const std::string& ln, const std::string& j, int ico):abstr_emp(fn, ln, j) {inchargeof = ico; }manager::manager(const abstr_emp& e, int ico):abstr_emp(e), inchargeof(0) { }manager::manager(const manager& m):abstr_emp(m) {inchargeof = m.inchargeof; }void manager::ShowAll() const {abstr_emp::ShowAll();cout << "Inchargeof: " << inchargeof << endl; }void manager::SetAll() {abstr_emp::SetAll();cout << "Enter inchargeof: ";cin >> inchargeof; }void fink::Data() const {cout << "Reportsto: " << reportsto << endl; }void fink::Get() {cout << "Enter resportsto: ";cin.get();getline(cin, reportsto); }fink::fink():abstr_emp() {reportsto = "Null"; }fink::fink(const std::string& fn, const std::string& ln, const std::string& j, const std::string& rpo):abstr_emp(fn, ln, j), reportsto(rpo) { }fink::fink(const abstr_emp& e, const std::string& rpo):abstr_emp(e), reportsto(rpo) { }fink::fink(const fink& e) : abstr_emp(e) {reportsto = e.reportsto; }void fink::ShowAll() const {abstr_emp::ShowAll();cout << "Reports to: " << reportsto << endl; }void fink::SetAll() {abstr_emp::SetAll();cout << "Enter reports to: ";cin.get();getline(cin, reportsto); }highfink::highfink():abstr_emp(), manager(),fink() { }highfink::highfink(const std::string& fn, const std::string& ln, const std::string& j, const std::string& rpo, int ico) :abstr_emp(fn, ln, j),manager(fn, ln, j, ico), fink(fn, ln, j, rpo) { }highfink::highfink(const abstr_emp& e, const std::string& rpo, int ico):abstr_emp(e), manager(e, ico), fink(e, rpo) { }highfink::highfink(const fink& f, int ico) : abstr_emp(f), manager(f, ico), fink(f) { }highfink::highfink(const manager& m, const std::string& rpo): abstr_emp(m), manager(m), fink(m, rpo) { }highfink::highfink(const highfink& h) : abstr_emp(h), manager(h), fink(h) { }void highfink::ShowAll() const {abstr_emp::ShowAll();manager::Data();fink::Data(); }void highfink::SetAll() {abstr_emp::SetAll();manager::Get();fink::Get(); }main.cpp
#include <iostream> using namespace std; #include "emp.h"int main(void) {employee em("Trip", "Harris", "Thumper");cout << em << endl;em.ShowAll();manager ma("Amorphia", "Spindragib", "Nuancer", 5);cout << ma << endl;ma.ShowAll();fink fi("Matt", "Oggs", "Oiler", "Juno Barr");cout << fi << endl;fi.ShowAll();highfink hf(ma, "Curly Kew");hf.ShowAll();cout << "Press a key for next phase:\n";cin.get();highfink hf2;hf2.SetAll();cout << "Using an abstr_emp * pointer:\n";abstr_emp* tri[4] = { &em,&fi,&hf,&hf2 };for (int i = 0; i < 4; i++)tri[i]->ShowAll();return 0; }總結
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