Gain insights into dynamic memory allocation, creating classes, and functions. Delve into inheritance, I/O, exception handling. Explore 90+ examples to master advanced C++ functionalities.

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If you’re looking to sharpen up your C++ programming skills, then you’re in the right place. You will start with learning about dynamic memory allocation, how to create classes, and constructors. 

In the latter half of the course, inheritance, functions, I/O, exception handling, and more. Throughout the course, you will study over 90 carefully designed examples aimed to enhance your understanding of the C++ language.  

By the time you finish this course, you will be able to use more advanced functionality in your C++ programs.

C++ Programming for Experienced Engineers

## Challenge

Write a function called `countTrailingZeros (int X)` that determines the number of trailing zeros at the end of X! (X factorial), where X is an arbitrary input from the user. 

**Note:** In case of a negative number X, your program should return -1.

## Example 1		 	                        

Input: 12

12! = 479001600

Number of zeros at the end of 12! = 2

## Example 2		 	                        

Input: 5

5! = 120

Number of zeros at the end of 5! = 1

## Example 3		 	                        

Input: -20

Number of zeros at the end of -20! = -1

## Coding exercise

Try to solve this challenge on your own. If you can’t solve it, you can look at the solution and explanation below.

# Challenge

Write a function called `countTrailingZeros (int X)` that determines the number of trailing zeros at the end of X! (X factorial), where X is an arbitrary input from the user. 

**Note:** In case of a negative number X, your program should return -1.

# Example 1		 	                        

Input: 12

12! = 479001600

Number of zeros at the end of 12! = 2

# Example 2		 	                        

Input: 5

5! = 120

Number of zeros at the end of 5! = 1

# Example 3		 	                        

Input: -20

Number of zeros at the end of -20! = -1

# Coding exercise

Try to solve this challenge on your own. If you can’t solve it, you can look at the solution and explanation below.

Learn to write the code for counting the number of trailing zeros at the end of a factorial.

Getting Off the Ground

Starters

Basic C++ Examples

Class Organization Examples

Class Constructor Examples

Classes and Objects Examples

More Classes and Objects Examples

Function Examples

Function Overloading Examples

Operator Overloading Examples

Free Store Examples

Inheritance Examples

Virtual Function Examples

Input Output Examples

Template Examples

Exception Handling Examples

STL Examples

Miscellaneous Examples

Conclusion

Trailing Zeros

Challenge

Example 1

Example 2