How to calculate time complexity of project or code in C++?

Question

I need a few samples of code and their time complexity and the description of how they calculated the time complexity.

Jaganathan Bantheswaran · Answer

You can calculate time complexity for algorithm. I have already answered your previous question http://www.c-sharpcorner.com/Forums/Thread/274819/what-is-the-time-complexity-of-binary-sort-in-c.aspx . Time complexity could be calculated based on the lines of code you written & usage of loops in your code. What are you going to do with the time complexity??

Joe Wilson · Answer

I was comparing two algorithm efficiency and time complexity so I asked to help me to calculate the time complexity of both algorithms and choose one of them.