zhishu.java

fengshiji1.java

@@ -1,16 +0,0 @@
-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;
-	}
-
-}

zhishu.java

@@ -0,0 +1,17 @@
+public class zhishu{
+
+　　public double zhishu（double x，double y） {
+　　if (y==0)
+            return 1;
+        else if(y==1)
+            return x;
+        else if(oushu(y))
+            return zhishu(x*x,y/2);
+        else  return zhishu(x*x,(y-1)/2)*x
+　　}
+    private boolean oushu(int n){
+        if(n%2==0)
+            return true;
+        else return false;
+    }
+}