I had just one on-campus interview.

I contacted them through a career fair. A software engineer from a network engineering team interviewed me for about 45 minutes.

• The first 10 minutes were spent asking me questions about my previous work experience and projects.
• The next 10 minutes involved an open-ended question on how to design a coke vending machine.
• During the last 10 to 15 minutes, he asked technical questions.

Write a C++ code to reverse the order of words in a string, without using any additional buffer.