cal1.java

cal1.java

@@ -0,0 +1,10 @@
+package Mypackage;
+
+public class cal1 {
+public static double add (double a,double b) {//加法
+	return a+b;
+}
+public static double sub (double a,double b) {//减法
+	return a-b;
+}
+}