how to remove this

[sahu0906]

'gcc' is not recognized as an internal or external command,
operable program or batch file.

'javac' is not recognized as an internal or external command,
operable program or batch file.

[shawon100]

Install gcc and javac compiler, set the bin path in environment variable path, set the path in putenv function also. You can see my tutorial video : How To Make An Online Compiler . See only windows os part.