【实验五】 模板类与多态
实验任务二
Person.hpp
点击查看代码
#ifndef PERSON_HPP
#define PERSON_HPP
#include <iostream>
#include <string>
using namespace std;
class Person
{
public:
Person() = default;
Person(string name, string telephone, string email = "")
{
this->name = name;
this->telephone = telephone;
this->email = email;
}
void telephone_change(string newnumber)
{
this->telephone = newnumber;
}
void email_change(string newemail)
{
this->email = newemail;
}
// friend
friend ostream &operator<<(ostream &out, Person &p);
friend istream &operator>>(istream &in, Person &p);
friend bool operator==(const Person &p1, Person &p2);
private:
string name, telephone, email;
};
ostream &operator<<(ostream &out, Person &p)
{
out << p.name << " ";
out << p.telephone << " ";
out << p.email << " ";
out << endl;
return out;
}
istream &operator>>(istream &in, Person &p)
{
getline(in, p.name);
getline(in, p.telephone);
getline(in, p.email);
getchar();
return in;
}
bool operator==(const Person &p1, Person &p2)
{
return p1.name == p2.name &&
p1.telephone == p2.telephone;
}
#endif
task2.cpp
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#include <iostream>
#include <fstream>
#include <vector>
#include "Person.hpp"
int main()
{
using namespace std;
vector<Person> phone_book;
Person p;
while(cin>>p)
phone_book.push_back(p);
for(auto &i: phone_book)
cout << i << endl;
cout << boolalpha << (phone_book.at(0) == phone_book.at(1)) << endl;
ofstream fout;
fout.open("phone_book.txt");
if(!fout.is_open())
{
cerr << "fail to open file phone_book.txt\n";
return 1;
}
for(auto &i: phone_book)
fout << i << endl;
fout.close();
system("pause");
return 0;
}
运行结果
回答问题
这个任务中，插入运算符<<被重载为友元函数。
- ① 在测试代码中， cout << i ，编译器会将这个表达式转换成什么样的函数调用？写出具体的函
数调用形式。- ostream &operator<<(cout, i);
- ② 在测试代码中， fout << i ，编译器会将这个表达式转换成什么样的函数调用？写出具体的函
数调用形式。- ostream &operator<<(fout, i);
实验任务三
main.cpp
点击查看代码
//=======================
// main.cpp
//=======================
// main function for the RPG style game
#include <iostream>
#include <string>
using namespace std;
using std::string;
#include "swordsman.hpp"
#include "player.hpp"
int main()
{
std::string tempName;
bool success = 0; // flag for storing whether operation is successful
cout << "Please input player's name: ";
cin >> tempName; // get player's name from keyboard input
player *human; // use pointer of base class, convenience for polymorphism *************
int tempJob; // temp choice for job selection
//选择职业
do
{
cout << "Please choose a job: 1 Swordsman, 2 Archer, 3 Mage" << endl;
cin >> tempJob;
system("cls"); // clear the screen
switch (tempJob)
{
case 1:
human = new swordsman(1, tempName); // create the character with user inputted name and job
success = 1; // operation succeed
break;
default:
break; // In this case, success=0, character creation failed
}
} while (success != 1); // so the loop will ask user to re-create a character
int tempCom; // temp command inputted by user
int nOpp = 0; // the Nth opponent
for (int i = 1; nOpp < 5; i += 2) // i is opponent's level
{
nOpp++;
system("cls");
cout << "STAGE" << nOpp << endl;
cout << "Your opponent, a Level " << i << " Swordsman." << endl;
system("pause");
swordsman enemy(i, "Warrior"); // Initialise an opponent, level i, name "Junior"
human->reFill(); // get HP/MP refill before start fight
while (!human->death() && !enemy.death()) // no died
{
success = 0;
while (success != 1)
{
showinfo(*human, enemy); // show fighter's information
cout << "Please give command: " << endl;
cout << "1 Attack; 2 Special Attack; 3 Use Heal; 4 Use Magic Water; 0 Exit Game" << endl;
cin >> tempCom;
switch (tempCom)
{
case 0:
cout << "Are you sure to exit? Y/N" << endl;
char temp;
cin >> temp;
if (temp == 'Y' || temp == 'y')
return 0;
else
break;
case 1:
success = human->attack(enemy);
human->isLevelUp();
enemy.isDead();
break;
case 2:
success = human->specialatt(enemy);
human->isLevelUp();
enemy.isDead();
break;
case 3:
success = human->useHeal();
break;
case 4:
success = human->useMW();
break;
default:
break;
}
}
if (!enemy.death()) // If AI still alive
enemy.AI(*human);
else // AI died
{
cout << "YOU WIN" << endl;
human->transfer(enemy); // player got all AI's items
}
if (human->death())
{
system("cls");
cout << endl
<< setw(50) << "GAME OVER" << endl;
delete human; // player is dead, program is getting to its end, what should we do here? question 6
system("pause");
return 0;
}
}
}
delete human; // You win, program is getting to its end, what should we do here? question 7
system("cls");
cout << "Congratulations! You defeated all opponents!!" << endl;
system("pause");
return 0;
}
container.hpp
点击查看代码
//=======================
// container.h
//=======================
// The so-called inventory of a player in RPG games
// contains two items, heal and magic water
#pragma once
#include <iostream> // Conditional compilation
using namespace std;
class container // Inventory
{
protected:
int numOfHeal; // number of heal
int numOfMW; // number of magic water
public:
container(); // constuctor
void set(int heal_n, int mw_n); // set the items numbers
int nOfHeal(); // get the number of heal
int nOfMW(); // get the number of magic water
void display(); // display the items;
bool useHeal(); // use heal
bool useMW(); // use magic water
};
container.cpp
<details>
<summary>点击查看代码</summary>
//=======================
// container.cpp
//=======================
// default constructor initialise the inventory as empty
include "container.hpp"
using namespace std;
container::container()
{
set(0, 0);
}
// set the item numbers
void container::set(int heal_n, int mw_n)
{
numOfHeal = heal_n;
numOfMW = mw_n;
}
// get the number of heal
int container::nOfHeal()
{
return numOfHeal;
}
// get the number of magic water
int container::nOfMW()
{
return numOfMW;
}
// display the items;
void container::display()
{
cout << "Your bag contains: " << endl;
cout << "Heal(HP+100): " << numOfHeal << endl;
cout << "Magic Water (MP+80): " << numOfMW << endl;
}
// use heal
bool container::useHeal()
{
numOfHeal--; // question 2
return 1; // use heal successfully
}
// use magic water
bool container::useMW()
{
numOfMW--;
return 1; // use magic water successfully
}
</details>
container.cpp
点击查看代码
//=======================
// container.cpp
//=======================
// default constructor initialise the inventory as empty
#include "container.hpp"
using namespace std;
container::container()
{
set(0, 0);
}
// set the item numbers
void container::set(int heal_n, int mw_n)
{
numOfHeal = heal_n;
numOfMW = mw_n;
}
// get the number of heal
int container::nOfHeal()
{
return numOfHeal;
}
// get the number of magic water
int container::nOfMW()
{
return numOfMW;
}
// display the items;
void container::display()
{
cout << "Your bag contains: " << endl;
cout << "Heal(HP+100): " << numOfHeal << endl;
cout << "Magic Water (MP+80): " << numOfMW << endl;
}
// use heal
bool container::useHeal()
{
numOfHeal--; // question 2
return 1; // use heal successfully
}
// use magic water
bool container::useMW()
{
numOfMW--;
return 1; // use magic water successfully
}
player.hpp
点击查看代码
//=======================
// player.h
//=======================
// The base class of player
// including the general properties and methods related to a character
#pragma once
#include <iomanip> // use for setting field width
#include <time.h> // use for generating random factor
#include "container.hpp"
#include <string>
using namespace std;
enum job {sw, ar, mg}; /* define 3 jobs by enumerate type
sword man, archer, mage */
class player
{
friend void showinfo(player &p1, player &p2);
friend class swordsman;
protected:
int HP, HPmax, MP, MPmax, AP, DP, speed, EXP, LV;
// General properties of all characters
string name; // character name
job role; /* character's job, one of swordman, archer and mage,
as defined by the enumerate type */
container bag; // character's inventory
public:
virtual bool attack(player &p)=0; // normal attack
virtual bool specialatt(player &p)=0; //special attack
virtual void isLevelUp()=0; // level up judgement
/* Attention!
These three methods are called "Pure virtual functions".
They have only declaration, but no definition.
The class with pure virtual functions are called "Abstract class", which can only be used to inherited, but not to constructor objects.
The detailed definition of these pure virtual functions will be given in subclasses. */
void reFill(); // character's HP and MP resume
bool death(); // report whether character is dead
void isDead(); // check whether character is dead
bool useHeal(); // consume heal, irrelevant to job
bool useMW(); // consume magic water, irrelevant to job
void transfer(player &p); // possess opponent's items after victory
void showRole(); // display character's job
private:
bool playerdeath; // whether character is dead, doesn't need to be accessed or inherited
};
player.cpp
点击查看代码
//=======================
// player.cpp
//=======================
// character's HP and MP resume
#include "player.hpp"
using namespace std;
void player::reFill()
{
HP = HPmax; // HP and MP fully recovered
MP = MPmax;
}
// report whether character is dead
bool player::death()
{
return playerdeath;
}
// check whether character is dead
void player::isDead()
{
if (HP <= 0) // HP less than 0, character is dead
{
cout << name << " is Dead." << endl;
system("pause");
playerdeath = 1; // give the label of death value 1
}
}
// consume heal, irrelevant to job
bool player::useHeal()
{
if (bag.nOfHeal() > 0)
{
HP = HP + 100;
if (HP > HPmax) // HP cannot be larger than maximum value
HP = HPmax; // so assign it to HPmax, if necessary
cout << name << " used Heal, HP increased by 100." << endl;
bag.useHeal(); // use heal
system("pause");
return 1; // usage of heal succeed
}
else // If no more heal in bag, cannot use
{
cout << "Sorry, you don't have heal to use." << endl;
system("pause");
return 0; // usage of heal failed
}
}
// consume magic water, irrelevant to job
bool player::useMW()
{
if (bag.nOfMW() > 0)
{
MP = MP + 100;
if (MP > MPmax)
MP = MPmax;
cout << name << " used Magic Water, MP increased by 100." << endl;
bag.useMW();
system("pause");
return 1; // usage of magic water succeed
}
else
{
cout << "Sorry, you don't have magic water to use." << endl;
system("pause");
return 0; // usage of magic water failed
}
}
// possess opponent's items after victory
void player::transfer(player &p)
{
cout << name << " got" << p.bag.nOfHeal() << " Heal, and " << p.bag.nOfMW() << " Magic Water." << endl;
system("pause");
this->bag.set(this->bag.nOfHeal + p.bag.nOfHeal, this->bag.nOfMW + p.bag.nOfMW); // question 3
// set the character's bag, get opponent's items
}
// display character's job
void player::showRole()
{
switch (role)
{
case sw:
cout << "Swordsman";
break;
case ar:
cout << "Archer";
break;
case mg:
cout << "Mage";
break;
default:
break;
}
}
// display character's job
void showinfo(player &p1, player &p2)
{
system("cls");
cout << "##############################################################" << endl;
cout << "# Player" << setw(10) << p1.name << " LV. " << setw(3) << p1.LV
<< " # Opponent" << setw(10) << p2.name << " LV. " << setw(3) << p2.LV << " #" << endl;
cout << "# HP " << setw(3) << (p1.HP <= 999 ? p1.HP : 999) << '/' << setw(3) << (p1.HPmax <= 999 ? p1.HPmax : 999)
<< " | MP " << setw(3) << (p1.MP <= 999 ? p1.MP : 999) << '/' << setw(3) << (p1.MPmax <= 999 ? p1.MPmax : 999)
<< " # HP " << setw(3) << (p2.HP <= 999 ? p2.HP : 999) << '/' << setw(3) << (p2.HPmax <= 999 ? p2.HPmax : 999)
<< " | MP " << setw(3) << (p2.MP <= 999 ? p2.MP : 999) << '/' << setw(3) << (p2.MPmax <= 999 ? p2.MPmax : 999) << " #" << endl;
cout << "# AP " << setw(3) << (p1.AP <= 999 ? p1.AP : 999)
<< " | DP " << setw(3) << (p1.DP <= 999 ? p1.DP : 999)
<< " | speed " << setw(3) << (p1.speed <= 999 ? p1.speed : 999)
<< " # AP " << setw(3) << (p2.AP <= 999 ? p2.AP : 999)
<< " | DP " << setw(3) << (p2.DP <= 999 ? p2.DP : 999)
<< " | speed " << setw(3) << (p2.speed <= 999 ? p2.speed : 999) << " #" << endl;
cout << "# EXP" << setw(7) << p1.EXP << " Job: " << setw(7);
p1.showRole();
cout << " # EXP" << setw(7) << p2.EXP << " Job: " << setw(7);
p2.showRole();
cout << " #" << endl;
cout << "--------------------------------------------------------------" << endl;
p1.bag.display();
cout << "##############################################################" << endl;
}
swordsman.hpp
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//=======================
// swordsman.h
//=======================
// Derived from base class player
// For the job Swordsman
#pragma once
#include "player.hpp"
using namespace std;
class swordsman : public player // subclass swordsman publicly inherited from base player
{
public:
swordsman(int lv_in=1, std::string name_in="Not Given");
// constructor with default level of 1 and name of "Not given"
void isLevelUp();
bool attack (player &p);
bool specialatt(player &p);
/* These three are derived from the pure virtual functions of base class
The definition of them will be given in this subclass. */
void AI(player &p); // Computer opponent
};
swordsman.cpp
点击查看代码
//=======================
// swordsman.cpp
//=======================
// constructor. default values don't need to be repeated here
#include "swordsman.hpp"
using namespace std;
swordsman::swordsman(int lv_in, string name_in)
{
role = sw; // enumerate type of job
LV = lv_in;
name = name_in;
// Initialising the character's properties, based on his level
HPmax = 150 + 8 * (LV - 1); // HP increases 8 point2 per level
HP = HPmax;
MPmax = 75 + 2 * (LV - 1); // MP increases 2 points per level
MP = MPmax;
AP = 25 + 4 * (LV - 1); // AP increases 4 points per level
DP = 25 + 4 * (LV - 1); // DP increases 4 points per level
speed = 25 + 2 * (LV - 1); // speed increases 2 points per level
playerdeath = 0;
EXP = LV * LV * 75;
bag.set(lv_in, lv_in);
}
void swordsman::isLevelUp()
{
using namespace std;
if (EXP >= LV * LV * 75)
{
LV++;
AP += 4;
DP += 4;
HPmax += 8;
MPmax += 2;
speed += 2;
cout << name << " Level UP!" << endl;
cout << "HP improved 8 points to " << HPmax << endl;
cout << "MP improved 2 points to " << MPmax << endl;
cout << "Speed improved 2 points to " << speed << endl;
cout << "AP improved 4 points to " << AP << endl;
cout << "DP improved 5 points to " << DP << endl;
system("pause");
isLevelUp(); // recursively call this function, so the character can level up multiple times if got enough exp
}
}
bool swordsman::attack(player &p)
{
double HPtemp = 0; // opponent's HP decrement
double EXPtemp = 0; // player obtained exp
double hit = 1; // attach factor, probably give critical attack
srand((unsigned)time(NULL)); // generating random seed based on system time
// If speed greater than opponent, you have some possibility to do double attack
if ((speed > p.speed) && (rand() % 100 < (speed - p.speed))) // rand()%100 means generates a number no greater than 100
{
HPtemp = (int)((1.0 * AP / p.DP) * AP * 5 / (rand() % 4 + 10)); // opponent's HP decrement calculated based their AP/DP, and uncertain chance
cout << name << "'s quick strike hit " << p.name << ", " << p.name << "'s HP decreased " << HPtemp << endl;
p.HP = int(p.HP - HPtemp);
EXPtemp = (int)(HPtemp * 1.2);
}
// If speed smaller than opponent, the opponent has possibility to evade
if ((speed < p.speed) && (rand() % 50 < 1))
{
cout << name << "'s attack has been evaded by " << p.name << endl;
system("pause");
return 1;
}
// 10% chance give critical attack
if (rand() % 100 <= 10)
{
hit = 1.5;
cout << "Critical attack: ";
}
// Normal attack
HPtemp = (int)((1.0 * AP / p.DP) * AP * 5 / (rand() % 4 + 10));
cout << name << " uses bash, " << p.name << "'s HP decreases " << HPtemp << endl;
EXPtemp = (int)(EXPtemp + HPtemp * 1.2);
p.HP = (int)(p.HP - HPtemp);
cout << name << " obtained " << EXPtemp << " experience." << endl;
EXP = (int)(EXP + EXPtemp);
system("pause");
return 1; // Attack success
}
bool swordsman::specialatt(player &p)
{
if (MP < 40)
{
cout << "You don't have enough magic points!" << endl;
system("pause");
return 0; // Attack failed
}
else
{
MP -= 40; // consume 40 MP to do special attack
// 10% chance opponent evades
if (rand() % 100 <= 10)
{
cout << name << "'s leap attack has been evaded by " << p.name << endl;
system("pause");
return 1;
}
double HPtemp = 0;
double EXPtemp = 0;
// double hit=1;
// srand(time(NULL));
HPtemp = (int)(AP * 1.2 + 20); // not related to opponent's DP
EXPtemp = (int)(HPtemp * 1.5); // special attack provides more experience
cout << name << " uses leap attack, " << p.name << "'s HP decreases " << HPtemp << endl;
cout << name << " obtained " << EXPtemp << " experience." << endl;
p.HP = (int)(p.HP - HPtemp);
EXP = (int)(EXP + EXPtemp);
system("pause");
}
return 1; // special attack succeed
}
// Computer opponent
void swordsman::AI(player &p)
{
if ((HP < (int)((1.0 * p.AP / DP) * p.AP * 1.5)) && (HP + 100 <= 1.1 * HPmax) && (bag.nOfHeal() > 0) && (HP > (int)((1.0 * p.AP / DP) * p.AP * 0.5)))
// AI's HP cannot sustain 3 rounds && not too lavish && still has heal && won't be killed in next round
{
useHeal();
}
else
{
if (MP >= 40 && HP > 0.5 * HPmax && rand() % 100 <= 30)
// AI has enough MP, it has 30% to make special attack
{
specialatt(p);
p.isDead(); // check whether player is dead
}
else
{
if (MP < 40 && HP > 0.5 * HPmax && bag.nOfMW())
// Not enough MP && HP is safe && still has magic water
{
useMW();
}
else
{
attack(p); // normal attack
p.isDead();
}
}
}
}
运行结果
