Why should I always enable compiler warnings?

Question

I often hear that when compiling C and C++ programs I should \"always enable compiler warnings\". Why is this necessary? How do I do that?

Sometimes I also hear tha

Answer 1

Ignoring warnings means you left sloppy code that not only could cause problems in the future for someone else, but also will make important compile messages less noticed by you. The more compiler output, the less anyone will notice or bother. Cleaner the better. It also means you know what you are doing. Warnings are very unprofessional, careless, and risky.