first commit

c.java

@@ -0,0 +1,29 @@
+package ¼ÆËãÆ÷;
+
+public class c {
+	
+public double  add(double a,double b)
+{
+	return a+b;
+}
+
+public double min(double a,double b)
+{
+	return a-b;
+}
+
+public double mul(double a,double b)
+{
+	
+	return a*b;
+}
+
+public double div(double a,double b)
+{
+	if(b!=0) 
+	 return a/b;
+	else
+	 return 0;
+	
+}
+}

d.java

@@ -1,10 +0,0 @@
-import java.util.Scanner;
-      public class c {    
-		public static void main(String args[]){
-		Scanner sc=new Scanner(System.in);
-		double a = sc.nextDouble(); //输入rad值
-		double b = Math.sin(a);//计算sin（）
-		double c = Math.cos(a);//计算cos（）
-		double d = Math.tan(a);//计算cos（）
-		System.out.println("sin值为"+b+" "+"sin值为"+c+" "+"tan值为"+d);    }
-}