The main point here is to show that a[b] and b[a] are the same thing where
one is a pointer and the other is an integer. It also shows random stuff you
can do with templates.
#include <stdio.h>
template <typename T, int X=9>
void boing(const char* s) {
T a[4];
T* aa = &(a[X]);
T* aaa = &(X[a]);
printf("%20s: %lu (%d) -- %p %p\n",s,sizeof(T),X,aa,aaa);
}
int main() {
boing<char>("char");
boing<int>("int");
boing<long,17>("long");
}Output
char: 1 (9) -- 0x7fff4592680d 0x7fff4592680d
int: 4 (9) -- 0x7fff45926814 0x7fff45926814
long: 8 (17) -- 0x7fff45926868 0x7fff45926868