static_cast is used to explicitly convert types, including data types, pointer types, constant types, and base class/derived class conversions, to improve code readability and avoid unexpected errors in implicit conversions.
static_cast usage
Answer the question:
static_cast is used for Explicitly convert expressions of different types.
Detailed expansion:
static_cast is a type conversion operator in C language, used to convert between expressions of different types. Its syntax is as follows:
<code>static_cast<new_type>(expression)</code>
Among them, new_type
is the target type, and expression
is the expression that needs to be converted.
Usage:
static_cast can be used for the following types of conversion:
-
Data type conversion: Conversion of one data type to another, such as from int to float.
-
Pointer type conversion: Convert one pointer type to another pointer type, such as converting from int to float.
-
Constant type conversion: Convert one constant type to another constant type, such as converting from
const int
to int
.
-
Base class and derived class conversion: Convert between base class and derived class.
Advantages:
- Explicit conversion, the compiler knows the intention of the conversion.
- Improve the readability and maintainability of the code.
- Avoid unexpected errors that may be caused by implicit conversion.
Note:
- static_cast is an explicit conversion. If the target type is incompatible with the source type, a compilation error will occur.
- Conversions may result in loss of precision or other data loss, so careful consideration is required.
- static_cast does nothing if the target type is the same as the source type.
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