In C programming, a source code file that contains common definitions and data structures that all programmers may use as required. Also called "include files," because the #include statement is used ...

(1) The text at the beginning of an email message. The header is generated by the client mail program that first sends it and by all the mail servers en route to the destination. Each node adds more ...

So these stop me from including this header file in multiple places? What if I have two separate files that both need to include these headers? The problem I'm having in my code is that I include some ...