OOP HomeWork

oop_hw1/oop_hw1_1/Func1.cpp

@@ -0,0 +1,5 @@
+#include "func.h"
+
+int f1(int num) {
+	return g1(num * 2);
+}

oop_hw1/oop_hw1_1/Func2.cpp

@@ -0,0 +1,8 @@
+#include "func.h"
+
+int g1(int num) {
+	return num * num;
+}
+int g2(int num) {
+	return f1(num * 3);
+}

oop_hw1/oop_hw1_1/MyMain.cpp

@@ -0,0 +1,7 @@
+#include <iostream>
+#include "func.h"
+using namespace std;
+int main(int argc, char * argv[]) {
+	cout << g2(10) << endl;
+	return 0;
+}

oop_hw1/oop_hw1_1/func.h

@@ -0,0 +1,9 @@
+#pragma once
+#ifndef FUNC_H
+#define FUNC_H
+
+int f1(int num);
+int g1(int num);
+int g2(int num);
+
+#endif

oop_hw1/oop_hw1_2/main.cpp

@@ -0,0 +1,14 @@
+#include <iostream>
+#include "print_this.h"
+#include "print_that.h"
+extern int print_count;
+
+int main() {
+#ifdef DO_THIS
+    print_this("Hello");
+#else
+    print_that("Hello");
+#endif
+    std :: cout << "Print called " << print_count << " times." << std::endl;
+    return 0;
+}

oop_hw1/oop_hw1_2/print.cpp

@@ -0,0 +1,7 @@
+#include <iostream>
+#include "print.h"
+int print_count = 0;
+void print(const std::string& s) {
+    ++print_count;
+    std::cout << s << std::endl;
+}

oop_hw1/oop_hw1_2/print.h

@@ -0,0 +1,6 @@
+#pragma once
+#include <string>
+#ifndef PRINT_H
+#define PRINT_H
+void print(const std::string& s);
+#endif

oop_hw1/oop_hw1_2/print_that.cpp

@@ -0,0 +1,5 @@
+#include "print.h"
+#include "print_that.h"
+void print_that(const std::string& s) {
+    print("That: " + s);
+}

oop_hw1/oop_hw1_2/print_that.h

@@ -0,0 +1,7 @@
+
+#pragma once
+#include <string>
+#ifndef PRINT_THAT_H
+#define PRINT_THAT_H
+void print_that(const std::string& s);
+#endif

oop_hw1/oop_hw1_2/print_this.cpp

@@ -0,0 +1,5 @@
+#include "print.h"
+#include "print_this.h"
+void print_this(const std::string& s) {
+    print("This: " + s);
+}

oop_hw1/oop_hw1_2/print_this.h

@@ -0,0 +1,6 @@
+#pragma once
+#include <string>
+#ifndef PRINT_THIS_H
+#define PRINT_THIS_H
+void print_this(const std::string& s);
+#endif

oop_hw1/oop_hw1_3/main.cpp

@@ -0,0 +1,17 @@
+#include <iostream>
+double average(int arr[], int size) {
+    int sum = 0;
+    for (int i = 0; i < size; ++i) sum += arr[i];
+    return (double)sum / size;
+}
+using namespace std;
+int main() {
+    int n;
+    cin >> n;
+    int * a = new int[n];
+    for (int i = 0;i < n;i++) {
+        cin >> a[i];
+    }
+    cout << average(a, n);
+    return 0;
+}

oop_hw1/oop_hw1_4/main.cpp

@@ -0,0 +1,11 @@
+#include <iostream>
+#include "t_area.h"
+
+using namespace std;
+
+int main() {
+	double a, b, c;
+	cin >> a >> b >> c;
+	cout << triangle_area(a,b,c) << endl;
+	return 0;
+}

oop_hw1/oop_hw1_4/t_area.cpp

@@ -0,0 +1,5 @@
+#include <cmath>
+double triangle_area(double a, double b, double c) {
+    double s = (a + b + c) / 2;
+    return sqrt(s * (s - a) * (s - b) * (s - c));
+}

oop_hw1/oop_hw1_4/t_area.h

@@ -0,0 +1,8 @@
+#pragma once
+#ifndef tarea
+#define tarea
+
+double triangle_area(double a, double b, double c);
+
+
+#endif // !tarea

oop_hw1/oop_hw1_5/check_num.h

@@ -0,0 +1,7 @@
+#pragma once
+#ifndef testchar
+#define testchar
+
+bool is_digit(char ch);
+
+#endif // !testchar

oop_hw1/oop_hw1_5/main.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+#include "check_num.h"
+
+using namespace std;
+int main()
+{
+	char ch;
+	for (int i = 0;i < 10;i++) {
+		cin >> ch;
+		cout << is_digit(ch)<<endl;
+	}
+	return 0;
+}

oop_hw1/oop_hw1_5/testchar.cpp

@@ -0,0 +1,3 @@
+bool is_digit(char ch) {
+    return ch >= '0' && ch <= '9';
+}

oop_hw1/oop_hw1_6/main.cpp

@@ -0,0 +1,16 @@
+#include <iostream>
+#include "sort.h"
+
+using namespace std;
+int main() {
+	int d, e;
+	cin >> d >> e;
+	sort_two(d, e);
+	int a, b, c;
+	cin >> a >> b >> c;
+	sort_three(a, b, c);
+	cout << "<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>" << endl;
+	cout << d << e <<endl;
+	cout << a << b << c;
+	return 0;
+}

oop_hw1/oop_hw1_6/sort.cpp

@@ -0,0 +1,9 @@
+#include <algorithm>
+void sort_two(int& a, int& b) {
+    if (a < b) std::swap(a, b);
+}
+void sort_three(int& a, int& b, int& c) {
+    if (a < b) std::swap(a, b);
+    if (a < c) std::swap(a, c);
+    if (b < c) std::swap(b, c);
+}

oop_hw1/oop_hw1_6/sort.h

@@ -0,0 +1,7 @@
+#pragma once
+#ifndef sort
+#define sort
+void sort_three(int& a, int& b, int& c);
+void sort_two(int& d, int& e);
+
+#endif // !sort

oop_hw1/oop_hw1_7/fib.cpp

@@ -0,0 +1,14 @@
+#include <iostream>
+long& smaller(long& a, long& b) { return (a < b) ? a : b; }
+long& bigger(long& a, long& b) { return (a >= b) ? a : b; }
+
+void fibe(int count) {
+    long a = 1, b = 1;
+    for (int i = 0; i < count; i++) {
+        long& min = smaller(a, b);
+        long& max = bigger(a, b);
+        min = a + b;
+        std::cout << max << " ";
+    }
+    std::cout << std::endl;
+}

oop_hw1/oop_hw1_7/fib.h

@@ -0,0 +1,9 @@
+#pragma once
+#ifndef fib
+#define fib
+
+long& smaller(long& a, long& b);
+long& bigger(long& a, long& b);
+void fibe(int count);
+
+#endif // !fib

oop_hw1/oop_hw1_7/main.cpp

@@ -0,0 +1,10 @@
+#include <iostream>
+#include "fib.h"
+
+using namespace std;
+int main() {
+	int n;
+	cin >> n;
+	fibe(n);
+	return 0;
+}

oop_hw1/oop_hw1_9/main.cpp

@@ -0,0 +1,43 @@
+#include <iostream>
+#include <string>
+#include <vector>
+
+class Pen {
+public:
+    void write() {}
+};
+
+class FountainPen : public Pen {
+public:
+    void refill() {}
+};
+
+class File {
+public:
+    std::string name;
+};
+
+class Directory {
+public:
+    std::vector<File> files;
+};
+
+class Printer {
+public:
+    void print(const std::string& doc) {}
+};
+
+class Monitor {
+public:
+    void display(const std::string& img) {}
+};
+
+class Sun {
+public:
+    void shine() {}
+};
+
+class Moon {
+public:
+    void reflect() {}
+};