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This is the Euclidean algorithm for finding the Greatest common divisor between two numbers. I thought I'd throw a bit of my own code into the fray. The first one uses a loop, the second uses recursion. Could someone benchmark this for me?
#!/usr/bin/perl -w print "GCD: " . GCD( 45, 5 ) . " RecGCD: " . RecGCD( 45, 5 ) . "\n"; #Assumes \$A is the largest number sub GCD { \$A = shift; \$B = shift; \$R = 1; while ( \$R != 0 ) { \$R = \$A % \$B; if ( \$R == 0 ) { return \$B; } \$A = \$B; \$B = \$R; } } #Assumes \$A is the largest number sub RecGCD { \$A = shift; \$B = shift; \$R = 0; \$R = \$A % \$B; if ( \$R == 0 ) { return \$B; } RecGCD( \$B, \$R ); }

--=Lolindrath=--

In reply to Re: Recursion: An example of Looping and Recursion by lolindrath

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