one or more of the IP address, port, userid or password are not valid. ?? where did you see this message..? it's not in anything in the picture i shared... the error msg is: Failed connect to MySQL bla bla bla...

i've created that "data" folder, and run init command.. there was no problem... but when testing connection, the problem still the same, i.e. below pic.. error connection[^] know how to fix it?

i wasn't have you read the link that i posted? i run this command: mysqld --init-file=C:\\mysql-init.txt and the error occurred

no. but the questions is: 1. why it make such error..? (e.g. tries to access non-exist folder) 2. why it doesn't create the folder by itself..? 3. should the folder created manually..? since it didn't mentioned anything in the article about that folder or even error-handling if it occurred

i wanna ask. i forgot my MySQL root password, so i tried to fix it based from this link: MySQL :: MySQL and Windows :: 4 Resetting the Root Password: Windows Systems[^] but it still doesn't work and there's few messages, but there's 1 error msg, i.e.: Failed to set datadir to 'C:\Program Files\MySQL\MySQL Server 8.0\data\' (OS errno: 2 - No such file or directory) in addition, there's also a warning i.e.: Can't create test file C:\Program Files\MySQL\MySQL Server 8.0\data\mysqld_tmp_file_case_insensitive_test.lower-test any1 know how to fix this issue..?

ic... maybe i was thought it got an error while posting...

ok, you have any suggested references for C tutorials? e-books, web, or anything...

ok, i guess i'll go for tutorials around 2015 and above do you have any suggestions on this?

but there's errors in old syntax if we use old tutorials coz, there's tutorials using old syntax of C and that's not used in today's C's syntax anymore e.g.: i have K&R book and their example is like:

#include main () { //this syntax is not allowed anymore, afaik... it should be int main() instead
//...
}

that's why i'm looking more for tutor that suit with the latest C's syntax, which is C17

i searched more for C17 and not just C tutorials coz, there's tutorials using old syntax of C and that's not used in today's C's syntax anymore e.g.: i have K&R book and their example is like:

#include main () { //this syntax is not allowed anymore, afaik... it should be int main() instead
//...
}

i'm looking more for tutor that suit with the latest C's syntax, which is C17

i wanna ask, can anyone suggest any good tutorials references for learning C from the beginning, especially for the latest C version (C17, afaik) ? refs can be web, e-books, or anything note: i tried google. found no tutorials for this.

i google-ed before i ask here but seems like it doesn't much tutorials for this

but wasn't C++ is used for many big applications? for me, i like them both... also java and C-like langs...

i actually learned some basics on C++ and seems like it doesn't really different with C#, so i wanna learn windows programming in both languages

can you give suggestions for which courses that you mean? did you mean online or offline courses? also, can you suggest couple of best book titles for this?

i didn't see any windows application tutorials in here: Introduction to C# - interactive tutorials | Microsoft Docs[^] can you give any suggestions like web or anything?

actually, i'm reading "The C# Programming Language - Fourth Edition" by Andres Hejlsberg, Mads Torgersen, etc but, i'll try to look to your suggestions thx

i wanna ask, anybody can give suggestions of references for tutorial for C# windows application using Visual Studio 2019? any references like e-books, web sites, etc

i wanna ask, what is the best environment for learning C++ for windows application? e.g. Win32 API, Qt, etc... also, could anyone suggest what's the best e-books for references?

this is really embarrassing! this was my mistake... thank you very much! i just fix the code and now it's working![^] this is the final test code:

#include

int main (int argc, char * argv []) {

if (argc > 1) {
	std::cout << argv\[1\] << std::endl;
}

std::cin.ignore(std::numeric\_limits::max(), '\\n');
std::cout << "press ENTER to close program.";
std::cin.get();
return 0;

}

really appreciate your reply!!