Frequently asked user defined function programs:

Introduction to User-defined functions in C++

The function is the group of statements defined by the user to perform some specific task. We can define more than one function in a program. The function acts upon the data and returns the value. There are basically two types of functions.

1. Library functions: These functions are predefined in C++.

Example: getch(), clrscr(), sizeof(), exit(), atof(), abort(), atoi(), fabs(), acos(), asin(), floor(), fmod(), pow() etc.

2. User-defined function: These functions are defined by the user itself.

Syntax: return_type  function_name(argument1, argument2, ...... , argumentn)

Example: int add( int a, int b), float multiplication( float a, float b, float c)

Frequently asked user-defined function programs:

1. Write a C++ program which defines function with no argument and no return value.

2. Write a C++ program which defines function with argument and a return value.

3. Write a C++ program in which find the factorial of a number using the function.

4. Write a C++ program which defines function with no argument and returns value.

5. Write a C++ program which defines function that returns multiple values.

6. Write a C++ program that explains the call by value functionality.

7. Write a C++ program to increment a number by some value using call by value.

8. Write a C++ program that explains the call by reference functionality.

9. Write a C++ program to swap two numbers by some value using call by reference.

10. Write a C++ program that explains the functionality of returning a reference by a user-defined function.

11. Write a C++ program to find the factorial of a number using recursion.

12. Write a C++ program to print the Fibonacci series using user-defined function.

Thanks

Mukesh Rajput