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CplusplusPractice/class.cc

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+#include <iostream>
+
+class Animal
+{
+    private:
+        int food;
+        int weight;
+    
+    public:
+        void setAnimal(int _food, int _weight)
+        {
+            food = _food;
+            weight = _weight;
+        }
+        void increaseFood(int inc)
+        {
+            food += inc;
+            weight += inc / 3;
+        }
+        void viewStat()
+        {
+            std::cout << "이 동물의 Food   : " << food << std::endl;
+            std::cout << "이 동물의 Weight : " << weight << std::endl;
+        }
+};
+
+int main()
+{
+    Animal animal;
+    animal.setAnimal(100, 50);
+    animal.increaseFood(30);
+
+    animal.viewStat();
+
+    return 0;
+}

CplusplusPractice/classpractice.cc

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+#include <string>
+#include <iostream>
+
+class Test
+{
+    std::string str;
+
+    public:
+        Test(std::string _str)
+        {
+            str = _str;
+            std::cout << "생성자 호출! " << str << std::endl;
+        }
+        ~Test()
+        {
+            std::cout << "소멸자 호출! " << str << std::endl;
+        }
+};
+
+class Foo
+{
+    int number;
+
+    public:
+        Foo(int inp) : number(inp) {}
+
+        int& accessNumber() { return number; }
+        int getNumber() { return number; }
+        void showNumber() { std::cout << number << std::endl; }
+};
+
+void simpleFunction()
+{
+    Test B("B Class");
+}
+
+int main()
+{
+    // Test A("A Class");
+    // simpleFunction();
+
+    Foo a(5);
+    a.showNumber();
+
+    int& c = a.accessNumber();
+    c = 4;
+    a.showNumber();
+
+    int d = a.accessNumber();
+    d = 3;
+    a.showNumber();
+
+    int f = a.getNumber();
+    f = 1;
+    a.showNumber();
+}

CplusplusPractice/classtest.cc

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+#include <iostream>
+
+class A {
+  int x;
+
+ public:
+  A(int c) : x(c) {}
+  A(const A &a) {
+    x = a.x;
+    std::cout << "복사 생성" << std::endl;
+  }
+};
+
+class B {
+  A a;
+
+ public:
+  B(int c) : a(c) {}
+  B(const B &b) : a(b.a) {}
+  A get_A() {
+    A temp(a);
+    return temp;
+  }
+};
+
+int main() {
+  B b(10);
+
+  std::cout << "---------" << std::endl;
+  A a1 = b.get_A();
+}

CplusplusPractice/dateclass.cc

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+#include <iostream>
+
+class Date
+{
+    private:
+        int year_, month_, day_;
+
+        int getMonthsMaxDay(int year, int month)
+        {
+            int months[12] = { 31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+            if (month == 2)
+            {
+                if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
+                     months[1] = 29;
+                else months[1] = 28;
+            }
+
+            return months[month - 1];
+        }
+
+    public:
+        Date();
+        Date(int year, int month, int day);
+        void addDay(int inc);
+        void addMonth(int inc);
+        void addYear(int inc);
+        void showDate();
+};
+
+Date::Date()
+    : year_(2004), month_(01), day_(01) {}
+
+Date::Date(int year, int month, int day)
+    : year_(year), month_(month), day_(day) {}
+
+void Date::addDay(int inc)
+{
+    day_ += inc;
+
+    for (; day_ > getMonthsMaxDay(year_, month_);)
+    {
+        day_ -= getMonthsMaxDay(year_, month_);
+        addMonth(1);
+    }
+}
+
+void Date::addMonth(int inc)
+{
+    month_ += inc;
+
+    for (; month_ > 12;)
+    {
+        month_ -= 12;
+        addYear(1);
+    }
+}
+
+void Date::addYear(int inc)
+{
+    year_ += inc;
+}
+
+void Date::showDate()
+{
+    if (month_ < 10 && day_ < 10)
+        std::cout << "Now Date() : " << year_ << "-0" << month_ << "-0" << day_ << std::endl;
+    else if (month_ < 10 && day_ > 9)
+        std::cout << "Now Date() : " << year_ << "-0" << month_ << "-" << day_ << std::endl;
+    else if (month_ > 9 && day_ < 10)
+        std::cout << "Now Date() : " << year_ << "-" << month_ << "-0" << day_ << std::endl;
+    else
+        std::cout << "Now Date() : " << year_ << "-" << month_ << "-" << day_ << std::endl;
+}
+
+int main()
+{
+    Date date(2020, 10, 10);
+    date.showDate();
+}

CplusplusPractice/header1.h

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+#include <iostream>
+
+namespace header1
+{
+    int foo()
+    {
+        std::cout << "This is H1 - foo()" << std::endl;
+
+        return 0;
+    }
+    void bar()
+    {
+        std::cout << "This is H1 - bar()" << std::endl;
+    }
+}

CplusplusPractice/header2.h

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+#include <iostream>
+
+namespace header2
+{
+    int foo()
+    {
+        std::cout << "This is H2 - foo()" << std::endl;
+
+        return 0;
+    }
+    void bar()
+    {
+        std::cout << "This is H2 - bar()" << std::endl;
+    }
+}

CplusplusPractice/legend.cc

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+#include <cstdio>
+
+class legend
+{
+private:
+    /* data */
+public:
+    legend();
+    ~legend();
+
+    void q1();
+    void q2();
+};
+
+legend::legend()
+{
+    printf("default create function call\n");
+}
+
+legend::~legend()
+{
+    printf("default delete function call");
+}
+
+// 1번 문제
+void legend::q1()
+{
+    for (int i = 4; i >= 0; --i)
+    {
+        for (int j = 0; j < i; ++j)
+        {
+            printf(" ");
+        }
+
+        for (int k = 0; k < 9 - (i * 2); ++k)
+        {
+            printf("*");
+        }
+
+        printf("\n");
+    }
+    printf("   |||   \n");
+}
+
+// 2번 문제
+void legend::q2()
+{
+    double scoreAvg;
+    printf("이번 학기에 받고 싶은 전과목 평균 점수가 무엇인고?\n");
+    scanf("%lf", &scoreAvg);
+
+    printf("너의 이번 학기 전과목 평균 점수는 %.1lf점이 될 것이니라~\n", scoreAvg);
+}
+
+
+int main()
+{
+    legend legeno;
+
+    legeno.q1();
+    legeno.q2();
+}

CplusplusPractice/namespace.cc

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+#include <iostream>
+#include "header1.h"
+#include "header2.h"
+
+using namespace header1;
+
+int main()
+{
+    foo();
+    header2::foo();
+}