https://terminalroot.com.br/2021/07/alternativas-para-compilar-seu-codigo-cpp-online.html
https://replit.com/languages/c
Code blocks
Apostilas:
https://www.cin.ufpe.br/~rrbs/AC_/LinguagemC/apostilaC.pdf
https://www.facom.ufu.br/~gustavo/ED1/Apostila_Linguagem_C
https://www.inf.ufpr.br/lesoliveira/download/c-completo-total.pdf