C + + cout execution order

C + + cout execution order

The problem description is this: If the function is called in cout , and the function contains an output statement, which sentence will be output first?

A closer look, suddenly found that the content of C + + forgotten, and did not see the output of the succession problem.

The implementation is as follows:

1 intMaxintXinty)2 3 {4 5 intmax=0;6 7max= (x>y)?x:y;8 9cout<<"2. max="<<max<<Endl;Ten  One returnMax; A  - } -  the intMainintargcChar*argv[]) -  - { -  +cout<<"1. max="<<max (6,8) <<Endl; -  + return 0; A  at}

Execution results

After querying the data, it is concluded that the cout is bound to the left, that is, the cout is executed from the back , and the order of the parameters stack is from right to left. This Endl will be called First, then Max (6,8) and "1. Max= "

, in fact, this problem is not very difficult, but the point to note is the combination of direction. If we think from the perspective of implementation, we can also get the same answer, combining the memory model of C + + and the features of C + + to let us keep this in mind.

Record it and leave it for later, while being convenient for others.

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Thank you for your support.

2016.3.25

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C + + cout execution order