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seekem.r
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Text File
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1990-04-16
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2KB
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76 lines
S Holmstead
S Holmstead
/* Seek 'em and Kill 'em */
int angle, range;
main ()
{
/* main loop */
while (1)
{
/* search for someone to kill */
drive (angle, 0);
while (!(range = scan (angle -= 10, 10)));
/* shoot at him */
cannon (angle, range);
/* loop until we loose sight of him */
while (range = scan (angle = track (angle, 5, 20), 10))
{
/* shoot at him */
cannon (angle, range);
/* if he is too far away, move in closer */
if (range > 200)
drive (angle, 50);
else
drive (angle, 0);
}
}
}
/* track: pinpoints the enemy (optimized from tiger's routine) */
track (d, r, l)
int d, r, l;
{
/* check for the end of recursion case */
if (r <= l)
{
/* see if he is still in front of us */
if (scan (d, r) > 0)
{
return (d);
}
else
{
/* see if he moved left */
if (scan (d-r, r) > 0)
{
return (d-r);
}
else
{
/* see if he moved right */
if (scan (d+r, r) > 0)
{
return (d+r);
}
else
{
/* can't find him */
/* expand our search range and try again */
return (track (d, r*2, l));
}
}
}
}
else
{
/* can't find him, give up */
return (d);
}
}