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Prefix and suffix of the auto-increment and auto-increment operators, and suffix of the operator prefix.
There is such a question in the exam:
12
inta = 4;(++a) += i;
Evaluate the value of a. The correct answer is 10.
If you think
Absrtact: In C language teaching, the self-increment self-subtraction operator is widely used, and it has certain skill and difficulty. Among the many operators, the self-increment decrement operator is the most difficult to understand and the most
1. Since the pre-increment and post-increment operators are unary operators, the overloads are distinguished by adding an int parameter (dummy parameter) to the post-increment, and when the post-increment is called, the compiler automatically
Before looking at the video course, it is not clear before the increment, after the increment, the amount of pre-decrement, after the reduction of the piece, this now know what happened, need to record down so that later.
var m = 10;
var n =
In the previous chapters we have been exposed to the overload of the increment operator, at that time we did not distinguish between the previous increment and the ++a difference, under normal circumstances we are not separate from the a++, but it
+ + increments each have pre-increment and post-increment differences, while overloaded operators, although the function names are the same, there should be a corresponding difference. The result of the increment operator before an integer variable
+ + self-increment front: First operation after the value a=3; B=++a; a=4; b=4;+ + + self-increment: First take value after Operation A=3; b=a++; a=4; b=3;--self-reducing pre-set: First operation after the value a=3; b=--a;a=2;b=2;--Self-reduction
Transferred from: http://bbs.csdn.net/topics/330189207C language's self-increment + +, self-subtraction-operator has always been a problem for beginners, and even a lot of veteran will be confused, recently I saw a problem on the Internet:#include
C + + Specifies that the suffix form has an int type parameter, and when the function is called, the compiler passes a value of 0 as the int parameter to the function.The prefix form of the increment means "add and then retrieve", and the suffix
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