Function Templates

 Function Templates

 Generic function for different types.

E.g. get the min value of three variables (int, float, char…)

Define function templates   46.cpp

Template<class S, class T…>

   func_name(…)

Func_name<type name>(…)  

something like macro

More powerful than macro

 

 

Function Templates

 

Using template functions

  Func_name<type_name list>(…)

47.cpp

Generic quick sort 47-1.cpp

Class templates

  Generic classes

 

Define class templates

 

Template<class  T>

Class {…}

Template<class T>

ret_type  class_name<type_name> :: 

 func_name ( … ){

}

48.cpp

 

 

 Class template examples

  Class_name<type_name..> obj…

Array class  49.cpp

Linked list 50.cpp

overload template functions 

 It is possible to overload a template function.

51.cpp

 

Template specialization

 An example from www.cplusplus.com

52.cpp

template <> class class_name <type>

 

 

Default value for templates paramters

template <class T = char> // With a default value.

template <int Tfunc (int)> // A function as parameter.

the implementation (definition) of a template class or function must be in the same file as the declaration.

 

 

Execptions

try

{ // code to be tried

   throw exception; }

catch (type  exception)

{ // code to be executed in case of exception }

 

  

Uncaught exception

  Uncaught exceptions will be thrown into outer scope.

If no catch, usually program will terminate.

Void terminate();

 

 

I/O system

  iostream.h

cin,cout,cerr,clog

iostream,fstream,strstream

Flags 57.cpp 58.cpp  

Overload “<<“  59.cpp

60.cpp 61.cpp 62.cpp 63.cpp 64.cpp