diminishing_function.c

#include <stdio.h>
/*
  This function, rec will prints all number between va and vb 
  in diminishing order.
  rec(1, 5) and rec(5, 1) give same output.
*/
int rec(int va, int vb) {
    (va > vb) && printf("%d\n", va);
    (vb >= va) && printf("%d\n", vb);
    return va != vb && rec(va - (va>vb), vb - (vb > va));
}

int main(int argc, char const* argv[])
{
    rec(5, 1);
    rec(1, 5);
    return 0;
}