What are the cast operators?

The operators are: 1. The C language series has (type) expression; 2. The C language series has static_cast, dynamic_cast, reinterpret_cast, const_cast(expression); 3. The Java language has (type) expression, type. valueOf(expression); 4. Python language has type(expression) and so on.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

In common programming languages, the following are some commonly used cast operators:

C language series:

(type) expression: Using parentheses will require conversion enclosed in data types as cast operators. For example, (int) 3.14 casts the floating point number 3.14 to an integer type.

C language series:

static_cast(expression): Use the static_cast keyword to perform forced type conversion. For example, static_cast(3.14) casts the floating point number 3.14 to an integer type.

dynamic_cast(expression): Used for type conversion of pointers or references in inheritance relationships, used to safely convert base class pointers or references to derived class pointers or references.

reinterpret_cast(expression): Used to perform type conversion between pointers. You can convert a pointer to a pointer of any other type, but it may lead to undefined behavior.

const_cast(expression): used to remove const attributes and convert const types to non-const types.

Java language:

(type) expression: Similar to C language, use parentheses to enclose the data type that needs to be converted for forced type conversion. For example, (int) 3.14 casts the floating point number 3.14 to an integer type.

Type.valueOf(expression): Some wrapper classes provide the valueOf() method, which can convert basic data types into corresponding wrapper class types. For example, Integer.valueOf("123") converts the string "123" to an integer type.

Python language:

type(expression): Use the type() function to convert the expression to the specified data type. For example, int(3.14) converts the floating point number 3.14 to an integer type.

Data type constructor: Different data types provide corresponding constructors, which can convert one data type to another data type. For example, int(3.14) converts the floating point number 3.14 to an integer type.

It should be noted that forced type conversion may cause data precision loss, overflow, or unexpected results. Therefore, you should operate with caution when performing type conversion to ensure the safety and correctness of the conversion. Where possible, implicit type conversions or safer type conversions should be preferred.

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