[n-body] fix some type errors

Author: moritz

shootout/n-body.p6.pl

@@ -4,16 +4,15 @@
 #
 # USAGE: perl6 n-body.p6.pl 1000
 
-constant PI 		= 3.141592653589793;
-constant SOLAR_MASS 	= (4 * PI * PI);
-constant DAYS_PER_YEAR	= 365.24;
+constant SOLAR_MASS 	= (4 * pi * pi);
+constant DAYS_PER_YEAR	= 365.24e0;
 
 constant $LAST = 4;
 
 # @ns = ( sun, jupiter, saturn, uranus, neptune )
-my Num @XS = (0, 4.84143144246472090e+00, 8.34336671824457987e+00,	1.28943695621391310e+01, 1.53796971148509165e+01);
-my Num @YS = (0, -1.16032004402742839e+00, 4.12479856412430479e+00,	-1.51111514016986312e+01, -2.59193146099879641e+01);
-my Num @ZS = (0, -1.03622044471123109e-01, -4.03523417114321381e-01,	-2.23307578892655734e-01, 1.79258772950371181e-01);
+my Num @XS = (0e0, 4.84143144246472090e+00, 8.34336671824457987e+00,	1.28943695621391310e+01, 1.53796971148509165e+01);
+my Num @YS = (0e0, -1.16032004402742839e+00, 4.12479856412430479e+00,	-1.51111514016986312e+01, -2.59193146099879641e+01);
+my Num @ZS = (0e0, -1.03622044471123109e-01, -4.03523417114321381e-01,	-2.23307578892655734e-01, 1.79258772950371181e-01);
 my Num @VXS = map {$^a * DAYS_PER_YEAR},
 		(0, 1.66007664274403694e-03, -2.76742510726862411e-03, 2.96460137564761618e-03, 2.68067772490389322e-03);
 my Num @VYS = map {$^a * DAYS_PER_YEAR},
@@ -63,7 +62,7 @@ ($dt)
 sub energy {
 	my Num ($e, $dx, $dy, $dz, $distance);
 
-	$e = 0.0;
+	$e = 0e0;
 	for 0..$LAST -> $i {
 		$e += 0.5 * @MASS[$i] *
 			(@VXS[$i]*@VXS[$i] + @VYS[$i]*@VYS[$i] + @VZS[$i]*@VZS[$i]);
@@ -79,7 +78,7 @@ sub energy {
 }
 
 sub offset_momentum {
-	my Num ($px, $py, $pz) = (0.0, 0.0, 0.0);
+	my Num ($px, $py, $pz) = (0e0, 0e0, 0e0);
 
 	for 0..$LAST -> $i {
 		$px += @VXS[$i] * @MASS[$i];