Modern C

Chapter 17. Variations in control flow

This chapter covers

• Understanding normal sequencing of statements in C
• Making short and long jumps through code
• Function control flow
• Handling signals

The control flow (see figure 2.1) of program execution describes how the individual statements of the program code are sequenced: that is, which statement is executed after another. Up to now, we have mostly looked at code that let us deduce this control flow from syntax and a controlling expression. That way, each function can be described using a hierarchical composition of basic blocks. A basic block is a maximum sequence of statements such that once execution starts at the first of these statements, it continues unconditionally until the last, and ...