Control Flow Graphs for C/C++ Programs

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We have provided a number of small examples to demonstrate how normalized C/C++ program components are represented in CFGs.

In these examples:

The kind of a point is shown in italics. If no kind is shown, then the kind is expression.

For the sake of reducing clutter, edge labels are only shown for edges coming out of control points. In actual fact, every edge in a CFG is labeled with a value; most are labeled True.

Inter-procedural edges are shown as dashed lines.

Not all points are shown, only those in the program's control-flow graph.

Elementary Program Components	Function Top-Level Expression
Function Calls	Basic With Parameters and Return Value
Control Flow Constructs	if statement for loop while loop do-while loop switch statement goto statement continue statement break statement

Elementary Program Components

Function
Top-Level Expression

Function Calls

Control Flow Constructs

A top-level expression, most frequently an assignment statement, is a point of kind "expression". Note that normalization will have removed any embedded side effects, function calls, conditional expressions, and short-circuiting Boolean expressions.

Control Flow Graphs for C/C++ Programs

Top-Level Expression