Chapter 5. 함수와 참조, 복사 생성자
1번
소스 코드
#include <iostream>
#include <string>
using namespace std;
class Circle {
int radius;
public:
Circle():Circle(1) {}
Circle(int r) { this->radius = r; }
void show() { cout << "반지름 : " << radius << endl; }
};
void swap(Circle& a, Circle& b) {
Circle tmp;
tmp = a;
a = b;
b = tmp;
}
int main() {
Circle a(1), b(2);
a.show();
b.show();
swap(a, b);
a.show();
b.show();
return 0;
}
2번
소스 코드
#include <iostream>
#include <string>
using namespace std;
void half(double &n){
n /= 2;
}
int main() {
double n = 20;
half(n);
cout << n;
return 0;
}
3번
소스 코드
#include <iostream>
#include <string>
using namespace std;
void combine(string &text1, string& text2, string& text3) {
text3 = text1 + " " + text2;
}
int main() {
string text1("I love you"), text2("very much");
string text3;
combine(text1, text2, text3);
cout << text3;
return 0;
}
4번
소스 코드
#include <iostream>
#include <string>
using namespace std;
bool bigger(int a, int b, int& big) {
if (a == b) {
big = a;
return true;
}
else {
if (a > b) big = a;
else big = b;
return false;
}
}
int main() {
int a, b, big;
a = 5; b = 5;
if (bigger(a, b, big)) {
cout << "두 수는 같습니다" << endl;
}
else {
cout << a << "와 " << b << "중 큰 수는 " << big << "입니다." << endl;
}
a = 5; b = 10;
if (bigger(a, b, big)) {
cout << "두 수는 같습니다" << endl;
}
else {
cout << a << "와 " << b << "중 큰 수는 " << big << "입니다." << endl;
}
return 0;
}
5번
소스 코드
#include <iostream>
#include <string>
using namespace std;
class Circle {
int radius;
public:
Circle(int r) { radius = r; }
int getRadius() { return radius; }
void setRadius(int r) { radius = r; }
void show() { cout << "반지름이 " << radius << "인 원" << endl; }
};
void increaseBy(Circle &a, Circle &b) {
int r = a.getRadius() + b.getRadius();
a.setRadius(r);
}
int main() {
Circle x(10), y(5);
increaseBy(x, y);
x.show();
return 0;
}
6번
소스 코드
#include <iostream>
#include <string>
using namespace std;
char& find(char a[], char c, bool& success) {
for (int i = 0; i < strlen(a); i++) {
if (a[i] == c) {
success = true;
return a[i];
}
}
success = false;
}
int main() {
char s[] = "Mike";
bool b = false;
char& loc = find(s, 'M', b);
if (b == false) {
cout << "M을 발견할 수 없다" << endl;
return 0;
}
loc = 'm';
cout << s << endl;
return 0;
}
7번
소스 코드
#include <iostream>
#include <string>
using namespace std;
class MyIntStack {
int p[10];
int tos;
public:
MyIntStack();
bool push(int n);
bool pop(int& n);
};
MyIntStack::MyIntStack() {
tos = -1;
}
bool MyIntStack::push(int n) {
if (tos >= 9) return false;
p[++tos] = n;
return true;
}
bool MyIntStack::pop(int& n) {
if (tos < 0) return false;
n = p[tos--];
return true;
}
int main() {
MyIntStack a;
for (int i = 0; i < 11; i++) {
if (a.push(i)) cout << i << ' ';
else cout << endl << i + 1 << " 번째 stack full" << endl;
}
int n;
for (int i = 0; i < 11; i++) {
if (a.pop(n)) cout << n << ' ';
else cout << endl << i + 1 << " 번째 stack empty";
}
cout << endl;
return 0;
}
8번
소스 코드
#include <iostream>
#include <string>
using namespace std;
class MyIntStack {
int* p;
int size;
int tos;
public:
MyIntStack() :MyIntStack(1) {}
MyIntStack(int size);
MyIntStack(MyIntStack& s);
~MyIntStack();
bool push(int n);
bool pop(int& n);
};
MyIntStack::MyIntStack(int size) {
this->p = new int[size];
this->size = size;
this->tos = -1;
}
MyIntStack::MyIntStack(MyIntStack& s) {
int len = s.size;
this->p = new int[len];
this->size = len;
this->tos = s.tos;
for (int i = 0; i <= tos; i++) {
this->p[i] = s.p[i];
}
}
MyIntStack::~MyIntStack() {
delete[] p;
}
bool MyIntStack::push(int n) {
if (tos >= 9) return false;
p[++tos] = n;
return true;
}
bool MyIntStack::pop(int& n) {
if (tos < 0) return false;
n = p[tos--];
return true;
}
int main() {
MyIntStack a(10);
a.push(10);
a.push(20);
MyIntStack b = a;
b.push(30);
int n;
a.pop(n);
cout << "스택 a에서 팝한 값 " << n << endl;
b.pop(n);
cout << "스택 b에서 팝한 값 " << n << endl;
return 0;
}
9번
소스 코드
#include <iostream>
#include <string>
using namespace std;
class Accumulator {
int value;
public:
Accumulator(int value);
Accumulator& add(int n);
int get();
};
Accumulator::Accumulator(int value) {
this->value = value;
}
Accumulator& Accumulator::add(int n) {
value += n;
return *this;
}
int Accumulator::get() {
return value;
}
int main() {
Accumulator acc(10);
acc.add(5).add(6).add(7);
cout << acc.get();
return 0;
}
10번
소스 코드
#include <iostream>
#include <string>
using namespace std;
class Buffer {
string text;
public:
Buffer(string text) { this->text = text; }
void add(string next) { text += next; }
void print() { cout << text << endl; }
};
Buffer& append(Buffer& buf, string text) {
buf.add(text);
return buf;
}
int main() {
Buffer buf("Hello");
Buffer& temp = append(buf, "Guys");
temp.print();
buf.print();
return 0;
}
11번
소스 코드
#include <iostream>
#include <string>
using namespace std;
class Book {
string title;
int price;
public:
Book(string title, int price);
Book(Book& b);
~Book();
void set(string tile, int price);
void show() { cout << title << ' ' << price << "원" << endl; }
};
Book::Book(string title, int price) {
this->title = title;
this->price = price;
}
Book::~Book() { }
void Book::set(string title, int price) {
this->title = title;
this->price = price;
}
Book::Book(Book& b) {
this->title = title;
this->price = price;
}
int main() {
Book cpp("명품C++", 10000);
Book java = cpp;
java.set("명품자바", 12000);
cpp.show();
java.show();
return 0;
}
12번
소스 코드
#include <iostream>
#include <string>
using namespace std;
class Dept {
int size;
int* scores;
public:
Dept(int size) {
this->size = size;
scores = new int[size];
}
Dept(Dept& dept);
~Dept();
int getSize() { return size; }
void read();
bool isOver60(int index);
};
Dept::Dept(Dept& dept) {
this->size = dept.size;
this->scores = new int[size];
for (int i = 0; i < this->size; i++) {
this->scores[i] = dept.scores[i];
}
}
Dept::~Dept() {
delete[] scores;
}
void Dept::read() {
cout << "10개 점수 입력>>";
for (int i = 0; i < size; i++) {
cin >> scores[i];
}
}
bool Dept::isOver60(int index) {
if (scores[index] >= 60) return true;
else return false;
}
int countPass(Dept dept) {
int count = 0;
for (int i = 0; i < dept.getSize(); i++) {
if (dept.isOver60(i))count++;
}
return count;
}
int main() {
Dept com(10);
com.read();
int n = countPass(com);
cout << "60점 이상은 " << n << "명";
return 0;
}
REFERENCE
명품 C++ Programming [개정판], 황기태