Looking for logging into the C System site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the C System site. After that you can login as usual with your login credentials.
https://www.quora.com/How-can-I-create-a-login-system-in-C
https://stackoverflow.com/questions/43555853/c-programming-login-system
https://www.daniweb.com/programming/software-development/threads/168783/how-how-to-write-a-c-source-code-for-a-login-system
https://cboard.cprogramming.com/cplusplus-programming/109501-login-system.html
https://www.c-sharpcorner.com/UploadFile/a5f59f/how-to-create-log-in-form-in-visual-studio-and-connection-wi/
http://www.cplusplus.com/forum/general/74374/
https://the-nerd.be/2013/03/14/objective-c-login-system-tutorial/
https://books.google.de/books?id=t2FtfN5DUr4C&pg=PA39&lpg=PA39&dq=c+login+system
https://books.google.de/books?id=4hpKj29LPuAC&pg=PA215&lpg=PA215&dq=c+login+system
https://books.google.de/books?id=Sf26BQAAQBAJ&pg=PA287&lpg=PA287&dq=c+login+system
https://medium.com/@mehanix/a-detailed-guide-to-creating-a-simple-login-form-using-c-and-sql-5c941bbded4d
https://books.google.de/books?id=qbB3DgAAQBAJ&pg=PA279&lpg=PA279&dq=c+login+system
https://books.google.de/books?id=ZqhJLzdftb8C&pg=PA31&lpg=PA31&dq=c+login+system