Explicit Type Conversion
If you are dealing with variables of type int
, rather than just numbers in code, you need to convert the value of a variable to double
or float
. This can be accomplished using the following syntax:
main.cpp
There are several ways to explicitly perform type conversion in C++. The previous one is called C-style conversion:
main.cpp
One more way is a function-style conversion:
main.cpp
There are also 4 type casting operators:
Cast Type | Description |
---|---|
static_cast |
Performs basic conversions |
dynamic_cast |
Used for more complex type conversions, particularly when dealing with inheritance and polymorphism |
reinterpret_cast |
Performs low-level reinterpretation of types |
const_cast |
Adds or removes const |
Most of the time, you only need a static_conversion
. We will not discuss other casts in-depth. Here is the syntax:
And here is an example:
main.cpp
We will not cover the difference between all of those. In general, static_cast
is preferable since it is more restrictive and can prevent some unexpected behavior with complex data types.
Select all the correct ways of performing type conversion.
Select a few correct answers
Everything was clear?
Course Content
C++ Data Types
2. Numerical Data Types
4. Other Data Types and Concepts
C++ Data Types
Explicit Type Conversion
If you are dealing with variables of type int
, rather than just numbers in code, you need to convert the value of a variable to double
or float
. This can be accomplished using the following syntax:
main.cpp
There are several ways to explicitly perform type conversion in C++. The previous one is called C-style conversion:
main.cpp
One more way is a function-style conversion:
main.cpp
There are also 4 type casting operators:
Cast Type | Description |
---|---|
static_cast |
Performs basic conversions |
dynamic_cast |
Used for more complex type conversions, particularly when dealing with inheritance and polymorphism |
reinterpret_cast |
Performs low-level reinterpretation of types |
const_cast |
Adds or removes const |
Most of the time, you only need a static_conversion
. We will not discuss other casts in-depth. Here is the syntax:
And here is an example:
main.cpp
We will not cover the difference between all of those. In general, static_cast
is preferable since it is more restrictive and can prevent some unexpected behavior with complex data types.
Select all the correct ways of performing type conversion.
Select a few correct answers
Everything was clear?