Evaluation of a Second-Degree Polynomial
To develop a better understanding of the rules of operator precedence, consider the evaluation of a second-degree polynomial y = ax2 + bx + c:
The circled numbers indicate the order in which C++ applies the operators. There is no arithmetic operator for exponentiation in C++, so we’ve represented x2 as
x * x. In Chapter 5, we’ll discuss the standard library function
pow (“power”) that performs exponentiation.
x in the preceding second-degree polynomial are initialized as follows:
a = 2,
b = 3,
c = 7 and
x = 5. Figure 2.8 illustrates the order in which the operators are applied ...