[My solution to the C language interview series] 007 operator priority

[My solution to the C language interview series] 007 operator priority

Operator priority

Run the following program:

Int main ()

{

If (0 & 1 = 0)

Printf ("0 & 1 = 0/N ");

Else

Printf ("0 & 1! = 0/N ");

If (0 & 1! = 0)

Printf ("0 & 1! = 0/N ");

Else

Printf ("0 & 1 = 0/N ");

System ("pause ");

Return 0;

}

The answer is:

0 & 1! = 0

0 & 1 = 0

Instead of what we think

0 & 1 = 0

0 & 1 = 0

 

= And! = The operator priority is higher than the &, ^, |, &, | Operator. Therefore,

If (0 & 1 = 0) is equivalent to If (0 & (1 = 0) Executing Else.

If (0 & 1! = 0) is equivalent to If (0 & (1! = 0) execute Else.

This interview question does not require us to remember the operator's priority. It is because this question makes many programmers take it for granted. After debugging, they find that they have suffered a loss, the program running result is not what you want. This only tells C/C ++ programmers a trap that is easy to make mistakes.