整合所有的代码，并测试了一些数据

Main.java

@@ -0,0 +1,38 @@
+package test;
+
+import java.util.Scanner;
+
+public class Main {
+	static double a,b;
+	public static double add (double a,double b) {//źÓˇ¨
+		return a+b;
+	}
+	public static double sub (double a,double b) {//źőˇ¨
+		return a-b;
+	}
+	
+	public static double mult(double a,double b) {//łË
+		return a*b;
+	}
+	public static double div(double a,double b) {//łý
+		return a/b;
+	}
+	
+	public static double power(double a,double b) {//ĂÝ
+		return Math.pow(a,b);
+	}
+	public static double sqrt(double a) {//żŞˇ˝
+		return Math.sqrt(a);
+	}
+	
+	public static double log(double a) {
+		return Math.log(a);
+		}
+
+	public static void main(String[] args) {
+		Scanner sc = new Scanner( System.in );
+		a=sc.nextInt();
+		b=sc.nextInt();
+		System.out.println(add(a,b)+" "+sub(a,b)+" "+mult(a,b)+" "+div(a,b)+" "+power(a,b)+" "+sqrt(a)+" "+log(a));
+	}
+}