Course Content
C++ Templates
C++ Templates
Creating Your First Template
Let's see what is happening when we specify different types for the template. For this we will use typeid().name()
, it simply shows the data type of the variable. Look at the example below:
main
#include <iostream> int main() { int x = 5; std::cout << typeid(x).name(); }
Note
The code snippet above will just display in console
i
, symbolizing thatx
is anint
.
Let's create a template using <typename Type>
and pass Type
as a parameter to the function instead of specifying a specific variable.
main
#include <iostream> template<typename Type> void check_type() { std::cout << typeid(Type).name() << std::endl; } int main() { // Try to change `int` to different type check_type<int>(); }
As you can see, when you call the template function and specify a type within the brackets, the typename
parameter receives that type. The name of the template parameter essentially becomes an alias for that type.
Task
- Turn the
swap
function into a template function:- define template using the
template
keyword; - add the list of template parameters;
- add one parameter for the template.
- define template using the
- Change all types (
int
) to thetypename
from the template parameter. - Call the template function and pass
char
as the type, swapping two variables in themain
function.
Once you've completed this task, click the button below the code to check your solution.
Thanks for your feedback!
Creating Your First Template
Let's see what is happening when we specify different types for the template. For this we will use typeid().name()
, it simply shows the data type of the variable. Look at the example below:
main
#include <iostream> int main() { int x = 5; std::cout << typeid(x).name(); }
Note
The code snippet above will just display in console
i
, symbolizing thatx
is anint
.
Let's create a template using <typename Type>
and pass Type
as a parameter to the function instead of specifying a specific variable.
main
#include <iostream> template<typename Type> void check_type() { std::cout << typeid(Type).name() << std::endl; } int main() { // Try to change `int` to different type check_type<int>(); }
As you can see, when you call the template function and specify a type within the brackets, the typename
parameter receives that type. The name of the template parameter essentially becomes an alias for that type.
Task
- Turn the
swap
function into a template function:- define template using the
template
keyword; - add the list of template parameters;
- add one parameter for the template.
- define template using the
- Change all types (
int
) to thetypename
from the template parameter. - Call the template function and pass
char
as the type, swapping two variables in themain
function.
Once you've completed this task, click the button below the code to check your solution.
Thanks for your feedback!
Creating Your First Template
Let's see what is happening when we specify different types for the template. For this we will use typeid().name()
, it simply shows the data type of the variable. Look at the example below:
main
#include <iostream> int main() { int x = 5; std::cout << typeid(x).name(); }
Note
The code snippet above will just display in console
i
, symbolizing thatx
is anint
.
Let's create a template using <typename Type>
and pass Type
as a parameter to the function instead of specifying a specific variable.
main
#include <iostream> template<typename Type> void check_type() { std::cout << typeid(Type).name() << std::endl; } int main() { // Try to change `int` to different type check_type<int>(); }
As you can see, when you call the template function and specify a type within the brackets, the typename
parameter receives that type. The name of the template parameter essentially becomes an alias for that type.
Task
- Turn the
swap
function into a template function:- define template using the
template
keyword; - add the list of template parameters;
- add one parameter for the template.
- define template using the
- Change all types (
int
) to thetypename
from the template parameter. - Call the template function and pass
char
as the type, swapping two variables in themain
function.
Once you've completed this task, click the button below the code to check your solution.
Thanks for your feedback!
Let's see what is happening when we specify different types for the template. For this we will use typeid().name()
, it simply shows the data type of the variable. Look at the example below:
main
#include <iostream> int main() { int x = 5; std::cout << typeid(x).name(); }
Note
The code snippet above will just display in console
i
, symbolizing thatx
is anint
.
Let's create a template using <typename Type>
and pass Type
as a parameter to the function instead of specifying a specific variable.
main
#include <iostream> template<typename Type> void check_type() { std::cout << typeid(Type).name() << std::endl; } int main() { // Try to change `int` to different type check_type<int>(); }
As you can see, when you call the template function and specify a type within the brackets, the typename
parameter receives that type. The name of the template parameter essentially becomes an alias for that type.
Task
- Turn the
swap
function into a template function:- define template using the
template
keyword; - add the list of template parameters;
- add one parameter for the template.
- define template using the
- Change all types (
int
) to thetypename
from the template parameter. - Call the template function and pass
char
as the type, swapping two variables in themain
function.
Once you've completed this task, click the button below the code to check your solution.