C++ Online Test

several link of C++ online :
1- https://paiza.io/projects/tBfsEKK1remo8X5OexegsA?language=cpp
2- https://www.onlinegdb.com/online_c++_compiler#
3- https://www.tutorialspoint.com/compile_cpp_online.php
4- https://repl.it/repls/SuddenDualDevicedriver?lite=&classroom_template=&outputonly=&fileName=