update

public/courses/prog-intro/homeworks/sum/Sum.java

@@ -0,0 +1,17 @@
+// Sum.java
+
+public class Sum {
+    public static void main(String[] args) {
+        System.out.println("number of arguments: " + args.length);
+        
+        int sum = 0;
+        for (String argument : args) {
+            sum = sum + argument;
+            System.out.println(argument);
+            System.out.println(sum);
+        }
+        
+        System.out.println(sum);
+    }
+}
+