nahiyan · November 19, 2020 05:25 · Nov 19, 2020
diff --git a/1.cpp b/1.cpp
@@ -0,0 +1,25 @@
+#include <iostream>
+using namespace std;
+class MyInfo
+{
+private: //  data  hidden  from  outside  world
+    int x;
+
+public:
+    //  function  to  set  value  of  variable  x
+    void set(int a) { x = a; }
+    //  function  to  return  value  of  variable  x
+    int get()
+    {
+        return x;
+    }
+};
+// main  function
+int main()
+{
+    MyInfo obj;
+    obj.set(5);
+    cout << obj.get();
+    // cout  is  used  inspite  of  printf()
+    return 0;
+}
diff --git a/2.cpp b/2.cpp
@@ -0,0 +1,23 @@
+#include <iostream>
+using namespace std;
+class MyInfo
+{
+private:
+    //  data  hidden  from  outside  world
+    int x;
+
+public:
+    //  function  to  set  value  of  variable  x
+    void set(int a);
+    //  function  to  return  value  of  variable  x
+    int get();
+};
+void MyInfo::set(int a) { x = a; }
+int MyInfo::get() { return x; } // main  function
+int main()
+{
+    MyInfo obj;
+    obj.set(5);
+    cout << obj.get(); // cout is used inspire of printf()
+    return 0;
+}
diff --git a/3.cpp b/3.cpp
@@ -0,0 +1,36 @@
+#include <iostream>
+using namespace std;
+class Calculator
+{
+private:
+    int num1;
+    int num2;
+
+public:
+    Calculator(int n1, int n2)
+    { // Constructor
+        num1 = n1;
+        num2 = n2;
+    }
+    int add() { return num1 + num2; }
+    int multiply()
+    {
+        return num1 * num2;
+    }
+    void display()
+    {
+        cout << "Numbers :  " << num1 << " and " << num2;
+        cout << "\n\t Add : " << add();
+        cout << "\n\t Multiply : " << multiply();
+        cout << endl
+             << endl;
+    }
+};
+int main()
+{
+    Calculator a(2, 4);
+    Calculator b(5, 3);
+    a.display();
+    b.display();
+    return 0;
+}
diff --git a/4.cpp b/4.cpp
@@ -0,0 +1,40 @@
+#include <iostream>
+using namespace std;
+template <class T>
+class Calculator
+{
+private:
+    T num1;
+    T num2;
+
+public:
+    Calculator(T n1, T n2)
+    {
+        num1 = n1;
+        num2 = n2;
+    }
+    T add()
+    {
+        return num1 + num2;
+    }
+    T multiply()
+    {
+        return num1 * num2;
+    }
+    void display()
+    {
+        cout << "Numbers :  " << num1 << " and " << num2;
+        cout << "\n\t Add : " << add();
+        cout << "\n\t Multiply : " << multiply();
+        cout << endl
+             << endl;
+    }
+};
+int main()
+{
+    Calculator<int> a(2, 4);
+    Calculator<float> b(2.2, 4.1);
+    a.display();
+    b.display();
+    return 0;
+}
diff --git a/5.cpp b/5.cpp
@@ -0,0 +1,48 @@
+#include <iostream>
+using namespace std;
+template <class T>
+class Calculator
+{
+private:
+    T num1;
+    T num2;
+
+public:
+    Calculator(T n1, T n2);
+    T add();
+    T multiply();
+    void display();
+};
+template <class T>
+Calculator<T>::Calculator(T n1, T n2)
+{
+    num1 = n1;
+    num2 = n2;
+}
+template <class T>
+T Calculator<T>::add()
+{
+    return num1 + num2;
+}
+template <class T>
+T Calculator<T>::multiply()
+{
+    return num1 * num2;
+}
+template <class T>
+void Calculator<T>::display()
+{
+    cout << "Numbers :  " << num1 << " and " << num2;
+    cout << "\n\t Add : " << add();
+    cout << "\n\t Multiply : " << multiply();
+    cout << endl
+         << endl;
+}
+int main()
+{
+    Calculator<int> a(2, 4);
+    Calculator<float> b(2.2, 4.1);
+    a.display();
+    b.display();
+    return 0;
+}
diff --git a/6.cpp b/6.cpp
@@ -0,0 +1,37 @@
+#include <iostream>
+using namespace std;
+class Box
+{
+private:
+    double length;
+    // Length  of a box
+    double breadth;
+    // Breadth  of a box
+    double height;
+    //  Height  of a box
+public:
+    //  Constructor  definition
+    Box(double l = 2.0, double b = 2.0, double h = 2.0)
+    {
+        cout << " Constructor  called." << endl;
+        length = l;
+        breadth = b;
+        height = h;
+    }
+    double Volume() { return length * breadth * height; }
+    int compare(Box box) { return this->Volume() > box.Volume(); }
+};
+int main(void)
+{
+    Box Box1(3.3, 1.2, 1.5); //  Declare  box
+    Box Box2(8.5, 6.0, 2.0); //  Declare  box
+    if (Box1.compare(Box2))
+    {
+        cout << "Box2  is  smaller  than Box1" << endl;
+    }
+    else
+    {
+        cout << "Box2  is  equal  to  or  larger  than Box1" << endl;
+    }
+    return 0;
+}
diff --git a/7.cpp b/7.cpp
@@ -0,0 +1,31 @@
+#include <iostream>
+using namespace std;
+class Complex
+{
+private:
+    int real, imag;
+
+public:
+    Complex(int r = 0, int i = 0)
+    {
+        real = r;
+        imag = i;
+    }
+    //  This  i s  automatically  called  when '+'i s  used  with
+    // between two Complex  objects
+    Complex operator+(Complex &obj)
+    {
+        Complex res;
+        res.real = real + obj.real;
+        res.imag = imag + obj.imag;
+        return res;
+    }
+    void print() { cout << real << " + i" << imag << endl; }
+};
+int main()
+{
+    Complex c1(10, 5);
+    Complex c2(2, 4);
+    Complex c3 = c1 + c2; // An example  call  to  "operator+"
+    c3.print();
+}