maths.java

来自「its a j2me code for fisherface」· Java 代码 · 共 22 行

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package util;
public class Maths {
    /** sqrt(a^2 + b^2) without under/overflow. **/
    public static double hypot(double a, double b) {
        double r;
        if (Math.abs(a) > Math.abs(b)) {
            r = b/a;
            r = Math.abs(a)*Math.sqrt(1+r*r);
           } else if (b != 0) {
               r = a/b;
               r = Math.abs(b)*Math.sqrt(1+r*r);
           } else {
                     r = 0.0;
           }
        return r;
    }
}