c ++优先顺序..该表达式如何求值？

Question

I am trying to understand code of some library of one simulation tool that i use.. It has the following line:

propData->fadingStretchingFactor =
        (double)(propProfile0->samplingRate) *
        propProfile->dopplerFrequency /
        propProfile0->baseDopplerFrequency /
        (double)SECOND;

Now how do u figure out the order of operations if there are two consecutive division operators as in this example

Answer 1

Division is left associative. a / b / c is equivalent to (a / b) / c .

Note that C (and C++) do not guarantee any ordering between the evaluations of the terms a , b , and c . For example, foo() / bar() could call foo() before bar() or foo() after bar() .

Answer 2

The grouping of operations of equal precedence is determined by operator associativity .

In C++, division is left-associative , which means that the leftmost operation is grouped first, ie:

a / b / c

is the same as:

(a / b) / c

Answer 3

Left to right associativity

http://en.wikipedia.org/wiki/Operators_in_C_and_C%2B%2B#Operator_precedence