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This article shows you how to use the C++ template, the content is concise and easy to understand, it will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

The application of templates in C++ programming language greatly improves the efficiency of program development to a certain extent. Let's explain the basic concepts of C++ template in detail.

Some time ago, I re-learned Clayboy, mainly looking at C++ programming ideas and C++ design new thinking. We have a better understanding of the use of templates, which are summarized as follows:

Common examples of C++ templates are listed below:

1. Static members of C++ template class

Template

< typename T>

Struct testClass {static int _ data;}; template

< >

Int testClass

< char>

:: _ data = 1; template

< >

Int testClass

< long>

:: _ data = 2; int main (void) {cout

< < boolalpha < < (1==testClass< char>

:: _ data)

< < endl; cout < < boolalpha < < (2==testClass< long>

:: _ data)

< < endl; } 2. C++模板类偏特化 template < class I, class O>

Struct testClass {testClass () {cout

< < "I, O" < < endl; } }; template < class T>

Struct testClass

< T*, T*>

{testClass () {cout

< < "T*, T*" < < endl; } }; template < class T>

Struct testClass

< const T*, T*>

{testClass () {cout

< < "const T*, T*" < < endl; } }; int main( void ) { testClass< int, char>

Obj1; testClass

< int*, int*>

Obj2; testClass

< const int*, int*>

Obj3;}

3. Class template + function template

Template

< class T>

Struct testClass

{

Void swap (testClass

< T>

&) {cout

< < "swap()" < < endl; } }; template < class T>

Inline void swap (testClass

< T>

& x

TestClass

< T>

& y)

{

X.swap (y)

}

Int main (void)

{

TestClass

< int>

Obj1

TestClass

< int>

Obj2

Swap (obj1, obj2)

}

4. Class member function template

Struct testClass {template

< class T>

Void mfun (const T & t) {cout

< < t < < endl; } template < class T>

Operator T () {return T ();}}; int main (void) {testClass obj; obj.mfun (1); int I = obj; cout

< < i < < endl; } 5. 缺省C++模板参数推导 template < class T>

Struct test {T a;}; template

< class I, class O=test< I>

> struct testClass {I b; O c;}; void main () {}

6. Untyped C++ template parameters

Template

< class T, int n>

Struct testClass {T _ t; testClass (): _ t (n) {}}; int main (void) {testClass

< int,1>

Obj1; testClass

< int,2>

Obj2;}

7. Empty template parameter

Template

< class T>

Struct testClass

Template

< class T>

Bool operator== (const testClass

< T>

&

Const testClass

< T>

&)

{

Return false

}

Template

< class T>

Struct testClass

{

Friend bool operator==

< >

(const testClass&, const testClass&)

}

Void main ()

{

}

8. Template template class

Struct Widget1 {template

< typename T>

T foo () {}}; template

< template< class T>

Class X > struct Widget2 {}; void main () {cout < < 3 < <'\ nails;} the above is how to use C++ templates. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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