first commit

fengshiji1.java

@@ -0,0 +1,16 @@
+package fengshiji;
+import  java.math.*;
+public class fengshiji1 
+{
+	public double duishu(double a,double b)
+	{
+		double res = log(a, b);
+	return res;
+	}
+
+	private double log(double a, double b) {
+		double h=Math.log10(b)/Math.log10(a);
+		return h;
+	}
+
+}