IOT-Web C-coding online
1) https://www.onlinegdb.com/online_c_compiler
2) https://www.programiz.com/c-programming/online-compiler/
3) https://www.w3schools.com/c/c_compiler.php
4) https://onecompiler.com/c
5) https://techiedelight.com/compiler/
6) https://www.tutorialspoint.com/compile_cpp_online.php
