Is there any workbook and practice samples for this app?

Question

How we can practice these lessons closer to real world?

Answer 1

Go online and look up practice problems for C++. That or try creating your own program and making it "idiot proof". Create a calculator or calender program, and try to handle errors a user may introduce constructively and without crashing the entire program.

Good books would be "Jumping into C++" and "Programming Principles and Practices using C++". They provide plenty of drills, practice programs, and walkthroughs of different features.