Kevin Dong questions

• How to write a function declaration that can handle multiple parameters in C? [closed]
• Why dots cannot be drawn "smoothly" with XDrawPoint ( X Window )?
• Print every string that is matched by regex in order
• Set background color in postscript
• How to generate 24-bit RGB values "more gracefully"?
• Is sum+++i undefined behavior in C? [duplicate]
• How can I share a const char array between two source files gracefully?
• Is "Fn key" not defined in X Window in "X11/keysymdef.h"?
• What does screen number and display number mean in Xlib?
• How does C preprocessor actually work?

Kevin Dong answers