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int x=5;
a[x] != x[a]; // I think: my work environments were just trashed 
              // by the server monkeys so I can't test.

#include <iostream>

int foo(int x, int *a)
{
    return x[a];
}

int main()
{
    int arr[10] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
    int x = 5;

    std::cout << arr[x] << " "
              << x[arr] << " "
              << foo(x, arr) << std::endl;
}

std::uint8_t byte
char code[3] = 0;
   ...
code[0] = "0123456789ABCDEF"[byte >> 8];
code[1] = "0123456789ABCDEF"[byte & 0xf];
std::cout << code;

phil.o wrote:

This highlights the fact that children are half-way between man and animal.