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Prefix increment and decrement operators: + + and-Grammar
+ + Unary-expression––unary-expression
NoteThe prefix increment operator (+ +) adds 1 to its operand, which is the result of an expression. The operand must be a left value that is not a
overloaded operators and conversions--Self-increment/self-decrement operatorIntroduction:Self-increment, the decrement operator is often implemented by classes such as iterators that provide pointers-like behavior to access elements in a sequence.
Like C, Java provides a rich shortcut for computing. These shortcuts can make the code more refreshing, easier to input, and easier for readers to read.Two good shortcuts are the increment and decrement operators (often referred to as "AutoIncrement"
Increment decrement operator
Before increment ++++ $a $ A increments by 1 and then returns $ A
After increment + + + $a first return $ A, then $ A since 1
Before decrement----$a $ A self minus 1 and then return $ A
After decrement--$a--returns $ A,
1. Increment decrement operatorThe C + + language does not require that the increment decrement operator be a member of a class. But because they change exactly the state of the object being manipulated. Therefore, it is recommended to set the
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
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
The self-increment and decrement operators in C + + provide a lot of convenience for adding 1 or minus 1 to objects, but they have both pre-and post-set forms and are prone to errors when used in combination with other operations, so write down
In C and C + +, the self-increment (+ +) and decrement (-) operators are often used in expressions to increase the value of a variable by 1 or minus 1, for example:++i (before using I, the value of I is added 1, if the original value of I is 3,
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
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