#include #define SIX 1+5 #define NINE 8+1 int main(void) { printf("%d * %d = %d\n", SIX, NINE, SIX * NINE); return 0; } https://github.com/Keith-S-Thompson/42
Ever waste days debugging a subtle bug introduced by C macros? It's PTSD material. I love C but I will never understand why C has a naive macro system.
The kenc[1] compiler subsequent to K&R C had much more constrained macro system exactly for those reasons. Thanks to advances in optimization and improved machine speed, it was reasonable to skip preprocessor-level const operations. Thanks to dead code elimination it was feasible to mostly give up conditional compilation.
[1] as used, for example, in Plan 9.