Modern C

Chapter 4. Expressing computations

This chapter covers

• Performing arithmetic
• Modifying objects
• Working with booleans
• Conditional compilation with the ternary operator
• Setting the evaluation order

We’ve already made use of some simple examples of expressions^C. These are code snippets that compute a value based on other values. The simplest such expressions are arithmetic expressions, which are similar to those we learned in school. But there are others, notably comparison operators such as == and !=, which we saw earlier.

In this chapter, the values and objects on which we will do these computations will be mostly of the type size_t, which we have already met. Such values correspond to “sizes,” so they are numbers that cannot be negative. ...