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package fengshiji;
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import java.math.*;
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public class fengshiji1
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{
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public double duishu(double a,double b)
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{
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double res = log(a, b);
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return res;
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}
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private double log(double a, double b) {
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double h=Math.log10(b)/Math.log10(a);
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return h;
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}
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}
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