Add C++ Programs

Added New C++ Programs

Board Paper Programs/Programs/prog2.cpp

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+#include <iostream>
+using namespace std;
+class temperature
+{
+    double cel;
+    double fah;
+    public:
+    temperature(); // Constructor
+    void convert();
+    void print(); 
+};
+temperature::temperature()
+{
+    cout << "Enter temperature in degree celsius: \n";
+    cin >> cel;
+}
+void temperature::convert()
+{
+    fah = cel*1.8000+32.00;
+}
+void temperature::print()
+{
+    cout<< "\nThe degree Fahrenheit Temperature is: \n";
+    cout << fah;
+}
+int main()
+{
+    temperature obj;
+    obj.convert();
+    obj.print();
+}

Board Paper Programs/Programs/prog3.cpp

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+#include <iostream>
+using namespace std;
+class avg
+{
+    float a, b, c, average; // Variable for 3 subjects
+    public:
+    avg(); //Constructor
+    void calculate();
+    void print();
+};
+avg::avg()
+{
+    cout << "Enter marks of 3 subjects:\t";
+    cin >> a >> b >> c;
+    cout << "Calculating...."<<endl;
+}
+void avg::calculate()
+{
+    average = (a+b+c)/3;
+}
+void avg::print()
+{
+    cout << "The average of 3 numbers is: "<<average;
+}
+int main()
+{
+    avg obj;
+    obj.calculate();
+    obj.print();
+}