respond to feedback of chapters 1 & 2

img/motivation-example-pdg.dot

@@ -55,4 +55,11 @@ subgraph cluster_f {
     //l3_in -> nr3 -> l4;
     //l10_in -> nr10 -> fee;
 }
+{
+    edge [constraint = false, style = dashed];
+    {l3 l10} -> enter_g [style = bold];
+    {l3_in l10_in} -> a_in;
+    //gee -> {fee l4};
+    //gne -> {nr10 nr3};
+}
 }

img/multiplycfg.dot

@@ -1,5 +1,15 @@
-		digraph g {
-		Start [shape=box];
-		End [shape=box];
-		Start -> "int result = 0" -> "while (x > 0)" -> "result += y" -> "x--" -> "while (x > 0)" -> "System.out.println(result)" -> "return result" -> "End";
-		}
+digraph g {
+	subgraph a {
+		E [label = "Entry", shape = box];
+		e [label = "Exit", shape = box];
+		c [label = <x_in = 2<br/>y_in = 3<br/>multiply(2, 3)>];
+		E -> c -> e;
+	}
+
+	subgraph b {
+		Entry [shape=box, label = <Entry<br/>x = x_in<br/>y = y_in>];
+		Exit [shape=box];
+		Entry -> "int result = 0" -> "while (x > 0)" -> "result += y" -> "x--" -> "while (x > 0)" -> "System.out.println(result)" -> "return result" -> Exit;
+		{ rank = same; "while (x > 0)"; "System.out.println(result)"}
+	}
+}

img/multiplypdg.dot

@@ -1,5 +1,11 @@
-digraph g {		"multiply()" [shape=box, rank=min];
+digraph g {
+	"main()" [shape=box, rank=min]
+	"main()" -> "multiply(2, 3)" -> {"x_in = 2" "y_in = 3"};
+
+	"multiply()" [shape=box, rank=min];
+	"multiply()" ->
 	// Rank adjustment
+	{ rank = same; "x = x_in" "y = y_in" }
 	{ rank = same; "int result = 0"; "while (x > 0)"; "System.out.println(result)"; "return result"; }
 	{ rank = same; "result += y"; "x--"; }
 	// Control flow
@@ -10,17 +16,17 @@ digraph g {		"multiply()" [shape=box, rank=min];
 	"while (x > 0)" -> "result += y" [style=bold];
 	"while (x > 0)" -> "x--" [style=bold];
 	// Data flow
-	"int result = 0" -> "result += y" [color=red];
-	"int result = 0" -> "System.out.println(result)" [color=red];
-	"int result = 0" -> "return result" [color=red];
-	"result += y" -> "result += y" [color=red];
-	"result += y" -> "System.out.println(result)" [color=red];
-	"result += y" -> "return result" [color=red];
-	"x--" -> "x--" [color=red];
-	"x--" -> "while (x > 0)" [color=red];
+	{ edge [color = red]
+		{"int result = 0" "result += y"} -> {"result += y" "System.out.println(result)" "return result"};
+		{"x--" "x = x_in"} -> {"x--" "while (x > 0)"};
+		"y = y_in" -> "result += y";
+	}
 	// Order adjustment
-	"int result = 0" -> "while (x > 0)" [style=invis];
-	"while (x > 0)" -> "System.out.println(result)" [style=invis];
-	"System.out.println(result)" -> "return result" [style=invis];
-	"result += y" -> "x--" [style=invis];
+	{ edge [style = invis];
+		"int result = 0" -> "while (x > 0)";
+		"while (x > 0)" -> "System.out.println(result)";
+		"System.out.println(result)" -> "return result";
+		"result += y" -> "x--";
+		"x = x_in" -> "int result = 0";
+	}
 }