Happy Codings - Programming Code Examples

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C++ Programming Code Examples

C++ > Beginners Lab Assignments Code Examples

Program for Virtual Function:

Program for Virtual Function:

A virtual function is a special form of member function that is declared within a base class and redefined by a derived class. The keyword virtual is used to create a virtual function, precede the function's declaration in the base class. If a class includes a virtual function and if it gets inherited, the virtual class redefines a virtual function to go with its own need. In other words, a virtual function is a function which gets override in the derived class and instructs the C++ compiler for executing late binding on that function. A function call is resolved at runtime in late binding and so compiler determines the type of object at runtime. 

#include 
using namespace std; 
class b
{
public:
virtual void show()
{
cout<<"\n  Showing base class....";
}
void display()
{
cout<<"\n  Displaying base class...." ;
}
};
class d:public b
{
public:
void display()
{
cout<<"\n  Displaying derived class....";
}
void show()
{
cout<<"\n  Showing derived class....";
}
};
int main()
{
b B;
b *ptr;
cout<<"\n\t P points to base:\n" ; ptr=&B; ptr->display();
ptr->show();
cout<<"\n\n\t P points to drive:\n"; d D; ptr=&D; ptr->display();
ptr->show();
}

C++ Table Show the legal values for Mode - Open a text file for reading. Create a text file for writing. Append to a text file and Open a binary file for reading. Create a binary file for writing. Append to a binary file. Open a text

C Specifies the buffer that Stream will use - Send to a buffered stream to filep1 and send to an unbuffered stream to filep2. Set buf to null to turn off buffering. The buffer must be BUFSIZ characters long. BUFSIZ is defined in

C Codes Surface Area & Volume of a Cube - The formula used to find the surface area and volume of the cube is surface_area = 6 * (a*a) and volume = a*a*a. Library Function is used in header file to compute Math Functions. We

Daylight saving time indicator in C coding - C Program the tm structure contains the following members. Seconds, 0-60, minutes, 0-59, hours, 0-23, day of the month, 1-31, Jan, 0-11, years from 1900, days since Sunday...

C Program Sample Implement Bitonic Sort - Compare and swap based on dir, sorts bitonic sequence in ascending order dir=1, otherwise in descending order. Code generates "Bitonic Sequence" by Sorting Recursively two halves

Program Print Fibonacci Series in a Range - Fibonacci series is a series of numbers where the current number is the sum of previous 2 terms. For Example: 0, 1, 1, 2, 3, 5, 8, 13, 21,... Here c is the current term, b is the n-1th term

Using Manipulators to Format I/O In C++ - 'boolalpha' turns on boolapha flag. 'dec' turns on dec flag. 'endl' output a newline character & flush the 'stream'. ends output a null. fixed Turns on fixed flag. flush Flush a stream. hex

Calculating Arithmetic Mean of Numbers - You enter number size then ask to enter the numbers of that size. To calculate arithmetic 'mean of all numbers', first perform addition of all the numbers, and then make a variable