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An operator is a symbol that tells the compiler to perform a specific mathematical or logical operation. C + + has a rich operator built into it and provides the following types of operators:
Arithmetic operators
Relational operators
When you operate in each expression, each part of the operation is evaluated in a certain order, which is the order of precedence of the operation, also called the precedence of the operator.
In an expression, if there is more than one operator,
The operands of predefined operators in C + + can only be basic data types, and in fact, for many user-defined types, similar operations are Required. For example:Class Complex{PublicComplex (double r=0.0,double i=0.0) {real=r;imag=i;}void Display ()
Found a good article:Reproduced:This paper mainly summarizes the operator overloading and C + + operator overloading summary from C + +.What is operator overloadingOperator overloading is to give multiple meanings to existing operators, causing
If you have an expression like 2 + 3 * 4, do you do the addition first, or do the multiplication first? Our high school math tells us that we should do multiplication first-which means that the multiplication operator takes precedence over the
"operator"at the time of the operation, if the closing parenthesis we know what to do first, then if there is no parentheses, arithmetic operators, relational operators, logical operators, bitwise operators, assignment operators, + + 、--operators,
The two priorities are the same, and the comparison (comparision) and Assignment (Assignment) operations are slightly different. The comparison operator has a, =, and so on, the assignment operator has =, + =, *=, and so on.
The comparison
The operator precedence specifies how tightly the two expressions are bound. For example, the result of the expression 1 + 5 * 3 is that it is because multiplication sign ("*") has a higher priority than the plus sign ("+"). You can use
The operator precedence specifies how tightly the two expressions are bound. For example, the result of the expression 1 + 5 * 3 is that It is because multiplication sign ("*") has a higher priority than the plus sign ("+"). You can use
C-language operators and their precedence summary table formulasRound down ARROW one commaExtraordinary increase and decrease the length of strong needlesThree multiplication, four plus minus, five shifts.Don't forget the fish, it's in Sheng Fan's
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