This was inspired by the kde version of xterm, which allows
each new window to be opened with a random pastel-colored
background.
This program ('rlc' --> random-light-colors)
generates ascii strings of the form 'rgb:hh/hh/hh' which
can be used to open an xterm window like this:
xterm -bg `rlc`
The source is listed below. I have a few bonehead 'c'
questions, however:
Why does this program compile without including stdio.h ?
Does it matter if the variable declarations come before
or after 'main()'?
Any problems with the style or the logic of the code?
Thanks!
================================
#include<stdlib.h>
int n,r,g,b; /* red, green, blue */
int
main(void)
{
srandomdev(); /* generate random bits */
n = 0x7fff & random(); /* but we need only 15 bits */
r = (n & 0x1f) | 0xe0; /* red -- force the top 3 bits to ones */
n >>= 5; /* next 5 bits */
g = (n & 0x1f) | 0xe0; /* green */
n >>= 5; /* next 5 bits */
b = (n & 0x1f) | 0xe0; /* blue */
printf("rgb:%x/%x/%x\n", r, g, b);
}
