Ruby 1.9.2p136(2010-12-25revision30365)

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# missing/hypot.c

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    00001 /* public domain rewrite of hypot */
    00002
    00003 #include <math.h>
    00004
    00005 double hypot(double x, double y)
    00006 {
    00007     if (x < 0) x = -x;
    00008     if (y < 0) y = -y;
    00009     if (x < y) {
    00010         double tmp = x;
    00011         x = y; y = tmp;
    00012     }
    00013     if (y == 0.0) return x;
    00014     y /= x;
    00015     return x * sqrt(1.0+y*y);
    00016 }
    00017