Every time you visit for the FIRST TIME today... [Part 1]

Post a random function that you made. May be from any project you've done or make one impromptu.

Any QUALITY is allowed. No bullying!

Eat some entry-level sorting algorithm I wrote for as a homework when I was 14

void selection(int a[], int l, int r)
{
int i, j;
for (i = l; i < r; i++) {
int min = i;
for (j = i + 1; j <= r; j++)
if (a[j] < a[min])
min = j;
swap(&a[i], &a[min]);
}
}