3-1
#include <iostream>
using namespace std;
class Tower
{
public:
Tower();
Tower(int input);
int getHeight();
private:
int meter;
};
int main()
{
Tower myTower;
Tower seoulTower(100);
cout << "높이는 " << myTower.getHeight() << "미터" << endl;
cout << "높이는 " << seoulTower.getHeight() << "미터" << endl;
}
Tower::Tower()
{
meter = 1;
}
Tower::Tower(int input)
{
meter = input;
}
int Tower::getHeight()
{
return meter;
}
3-2
#include <iostream>
#include <string>
using namespace std;
class Date
{
public:
Date(int year, int month, int day);
Date(string s);
void show();
int getYear();
int getMonth();
int getDay();
private:
int y;
int m;
int d;
};
int main()
{
Date birth(2014, 3, 20);
Date independenceDay("1945/8/15");
independenceDay.show();
cout << birth.getYear() << ',' << birth.getMonth() << ',' << birth.getDay() << endl;
}
Date::Date(int year, int month, int day)
{
y = year;
m = month;
d = day;
}
Date::Date(string s)
{
int ind;
y = stoi(s);
ind = s.find('/');
m = stoi(s.substr(ind + 1));
ind = s.find('/', ind + 1);
d = stoi(s.substr(ind + 1));
}
int Date::getYear()
{
return y;
}
int Date::getMonth()
{
return m;
}
int Date::getDay()
{
return d;
}
void Date::show()
{
cout << y << "년" << m << "월" << d << "일" << endl;
}
3-3
#include <iostream>
using namespace std;
class Account
{
public:
Account(string name, int id, int balance);
void deposit(int input);
string getOwner();
int inquiry();
int withdraw(int withdrawal);
private:
int total=0;
string n;
int output;
};
int main()
{
Account a("kitae", 1, 5000);
a.deposit(50000);
cout << a.getOwner() << "의 잔액은 " << a.inquiry() << endl;
int money = a.withdraw(20000);
cout << a.getOwner() << "의 잔액은 " << a.inquiry() << endl;
}
Account::Account(string name, int id, int balance)
{
n = name;
total += balance;
}
void Account::deposit(int input)
{
total+= input;
}
string Account::getOwner()
{
return n;
}
int Account::inquiry()
{
return total;
}
int Account::withdraw(int withdrawal)
{
output=withdrawal;
total -= output;
return output;
}
3-4
#include <iostream>
using namespace std;
class CoffeeMachine
{
public:
CoffeeMachine(int c, int w, int s);
void drinkEspresso();
void drinkAmericano();
void drinkSugarCoffee();
void show();
void fill();
private:
int coffee;
int water;
int sugar;
};
int main()
{
CoffeeMachine java(5, 10, 3);
java.drinkEspresso();
java.show();
java.drinkAmericano();
java.show();
java.drinkSugarCoffee();
java.show();
java.fill();
java.show();
}
CoffeeMachine::CoffeeMachine(int c, int w, int s)
{
coffee = c;
water = w;
sugar = s;
}
void CoffeeMachine::drinkEspresso()
{
coffee--;
water--;
}
void CoffeeMachine::drinkAmericano()
{
coffee--;
water -= 2;
}
void CoffeeMachine::drinkSugarCoffee()
{
coffee--;
water -= 2;
sugar--;
}
void CoffeeMachine::show()
{
cout << "커피 머신 상태, " << "커피:" << coffee << " 물:" << water << " 설탕:" << sugar << endl;
}
void CoffeeMachine::fill()
{
coffee = 10;
water = 10;
sugar = 10;
}
3-5
#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
class Random
{
int seed = 0;
public:
int next();
int nextInRange(int start, int end);
};
int main()
{
Random r;
cout << "--0에서 " << RAND_MAX << "까지의 랜덤 정수 10개--" << endl;
for (int i = 0; i < 10; i++)
{
int n = r.next();
cout << n << ' ';
}
cout << endl << endl << "-- 2에서 " << "4 까지의 랜덤 정수 10개 --" << endl;
for (int i = 0; i < 10; i++)
{
int n = r.nextInRange(2, 4);
cout << n << ' ';
}
cout << endl;
}
// Random::Random()
int Random::next()
{
srand((unsigned)time(0));
int n = rand();
return n;
}
int Random::nextInRange(int start, int end)
{
srand((unsigned)time(0));
int n = rand() % (end - start + 1) + start;
return n;
}
3-6
#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
class EvenRandom
{
int seed = 0;
public:
int next();
int nextInRange(int start, int end);
};
int EvenRandom::next()
{
srand((unsigned)time(0));
int n;
do
{
n = rand();
} while (n % 2 == 1);
return n;
}
int EvenRandom::nextInRange(int start, int end)
{
srand((unsigned)time(0));
int n;
do
{
n = rand() % (end - start + 1) + start;
} while (n % 2 == 1);
return n;
}
int main()
{
EvenRandom r;
cout << "--에서 " << RAND_MAX << "까지의 정수 10개--" << endl;
for (int i = 0; i < 10; i++)
{
int n = r.next();
cout << n << ' ';
}
cout << endl << endl << "--2에서 4까지의 랜덤 정수 10개--" << endl;
for (int i = 0; i < 10; i++)
{
int n = r.nextInRange(2, 4);
cout << n << ' ';
}
cout << endl;
return 0;
}
3-7
#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
class SelectableRandom {
int seed = 0;
public:
int nextEven();
int nextOdd();
int nextEvenInRange(int start, int end);
int nextOddInRange(int start, int end);
};
int SelectableRandom::nextEven() {
srand((unsigned int)time(0));
int n;
do {
n = rand();
} while (n % 2 == 1);
return n;
}
int SelectableRandom::nextOdd() {
srand((unsigned int)time(0));
int n;
do {
n = rand();
} while (n % 2 == 0);
return n;
}
int SelectableRandom::nextEvenInRange(int start, int end) {
srand((unsigned int)time(0));
int n;
do {
n = rand() % (end - start + 1) + start;
} while (n % 2 == 1);
return n;
}
int SelectableRandom::nextOddInRange(int start, int end) {
srand((unsigned int)time(0));
int n;
do {
n = rand() % (end - start + 1) + start;
} while (n % 2 == 0);
return n;
}
int main() {
SelectableRandom r;
cout << "-- 0에서 " << RAND_MAX << "까지의 정수 10개--" << endl;
for (int i = 0; i < 10; i++) {
int n = r.nextEven();
cout << n << ' ';
}
cout << endl << endl << "-- 2에서 9까지의 랜덤 홀수 정수 10개 --" << endl;
for (int i = 0; i < 10; i++) {
int n = r.nextOddInRange(2, 9);
cout << n << ' ';
}
cout << endl;
return 0;
}
3-8
#include <iostream>
#include <string>
using namespace std;
class Integer
{
public:
int r;
Integer(int num) { r = num; };
int get() { return r; };
void set(int num) { r = num; };
Integer(string s) { r = stoi(s); };
bool isEven() {
if (r % 2 == 0)
return true;
else
return false;
};
};
int main()
{
Integer n(30);
cout << n.get() << ' ';
n.set(50);
cout << n.get() << ' ';
Integer m("300");
cout << m.get() << ' ';
cout << m.isEven();
return 0;
}
3-9
#include <iostream>
using namespace std;
class Oval
{
int width, height;
public:
Oval(int a, int b) { width = a; height = b; };
Oval() { width = 1; height = 1; };
~Oval() { cout <<"Oval 소멸 : width = "<< width << ", height = "<< height << endl; }
int getWidth() { return width; };
int getHeight() { return height; };
void set(int w, int h) { width = w; height = h; };
void show() { cout << "width: " << width << "," << "height: " << height; };
};
int main()
{
Oval a, b(3,4);
a.set(10, 20);
a.show();
cout << b.getWidth() << "," << b.getHeight() << endl;
}
3-10 (1)main
#include <iostream>
using namespace std;
#include "Calculate.h"
int main()
{
Add a;
Sub s;
Mul m;
Div d;
while (true)
{
cout << "두 정수와 연산자를 입력하세요>>";
int x, y;
char op;
cin >> x >> y >> op;
if (op == '*')
cout << m.calculate() << endl;
else if (op == '/')
cout << d.calculate() << endl;
else if (op == '+')
cout << a.calculate() << endl;
else if (op == '-')
cout << s.calculate() << endl;
else
{
}
}
return 0;
}
(2)
#pragma once
#ifndef CALCULATOR_H
#define CALCULATOR_H
#include <iostream>
using namespace std;
class Add
{
int a, b;
public:
void setValue(int x, int y);
int calculate();
};
class Sub
{
int a, b;
public:
void setValue(int x, int y);
int calculate();
};
class Mul
{
int a, b;
public:
void setValue(int x, int y);
int calculate();
};
class Div
{
int a, b;
public:
void setValue(int x, int y);
int calculate();
};
#endif
(3)
#include <iostream>
using namespace std;
#include "Calculate.h"
void Add::setValue(int x, int y)
{
a = x;
b = y;
}
void Sub::setValue(int x, int y)
{
a = x;
b = y;
}
void Mul::setValue(int x, int y)
{
a = x;
b = y;
}
void Div::setValue(int x, int y)
{
a = x;
b = y;
}
int Add::calculate()
{
return a + b;
}
int Sub::calculate()
{
return a - b;
}
int Mul::calculate()
{
return a * b;
}
int Div::calculate()
{
return a / b;
}
3-11 (1)
#include <iostream>
using namespace std;
#include "Calculate.h"
void Add::setValue(int x, int y)
{
a = x;
b = y;
}
void Sub::setValue(int x, int y)
{
a = x;
b = y;
}
void Mul::setValue(int x, int y)
{
a = x;
b = y;
}
void Div::setValue(int x, int y)
{
a = x;
b = y;
}
int Add::calculate()
{
return a + b;
}
int Sub::calculate()
{
return a - b;
}
int Mul::calculate()
{
return a * b;
}
int Div::calculate()
{
return a / b;
}
(2)
#include <iostream>
using namespace std;
#include "Box.h"
Box::Box(int w,int h)
{
setSize(w, h);
fill = '*';
}
void Box::setFill(char f)
{
fill = f;
}
void Box::setSize(int w, int h)
{
width = w;
height = h;
}
void Box::draw()
{
for (int n = 0; n < height; n++)
{
for (int m = 0; m < width; m++)
cout << fill;
cout << endl;
}
}
(3)
#include <iostream>
using namespace std;
#include "Box.h"
int main()
{
Box b(10, 2);
b.draw();
cout << endl;
b.setSize(7, 4);
b.setFill('^');
b.draw();
return 0;
}
3-12 (1)
#pragma once
#ifndef RAM_H
#define RAM_H
class Ram
{
char mem[100 * 1024];
int size;
public:
Ram();
~Ram();
char read(int address);
void write(int address, char value);
};
#endif
(2)
#include <iostream>
using namespace std;
#include "Ram.h"
Ram::Ram()
{
for (int i = 0; i < 100 * 1024; i++)
{
mem[i] = 0;
}
size = 100 * 1024;
}
Ram::~Ram()
{
cout << "메모리 제거됨\n";
}
char Ram::read(int address)
{
return mem[address];
}
void Ram::write(int address, char value)
{
mem[address] = value;
}
(3)
#include <iostream>
using namespace std;
#include "Ram.h"
int main()
{
Ram ram;
ram.write(100, 20);
ram.write(101, 30);
char res = ram.read(100) + ram.read(101);
ram.write(102,res);
cout << "102 번지의 값 = " << (int)ram.read(102) << endl;
}