test a simple loop in Simple.java

test/Simple.java

@@ -1,7 +1,11 @@
 public class Simple {
+  private static int pow(int a, int b) {
+    int c = 1;
+    for (int i = 0; i < b; ++i) c *= a;
+    return c;
+  }
+
   public static void main(String[] args) {
-    int a = 1;
-    int b = 2;
-    int c = a + b;
+    pow(2, 3);
   }
 }