What are preprocessor directives in C and C++?

Welcome to the best video you have ever seen.
It is about what preprocessor directives like #include , #define and #pragma are.

[ajtan]

Also, in case it's still not obvious, preprocessor directives don't give a flying f*ck about scopes, so this is possible:

#include <stdio.h>

void {
#define LeGeNdArY_OuTrO "cursed Linus"
}

int main(void) {
printf("Bring back %s.", LeGeNdArY_OuTrO);
return 0;
}

[thegoingwolf]

how do you only have 700 subs, like what this is so good

[hermanzhukov]

What about the more powerful #pragma directive alternative, the #ligma directive?

[thecrazyparrot]

my c++ professor offered me coke today

[glyikerprobit]

I didn't get it. I'm also drunk