4.1 Function Templates,Overlaoding Function Templates.pptx

Sanjivani Rural Education Society’s
Sanjivani College of Engineering, Kopargaon-423 603
(An Autonomous Institute, Affiliated to Savitribai Phule Pune University, Pune)
NAAC ‘A’ Grade Accredited, ISO 9001:2015 Certified
Department of Computer Engineering
(NBA Accredited)
Prof. I. B. Tirse
Assistant Professor
E-mail : tirseishwaricomp@Sanjivani.org.in
Contact No: 7507113718
Subject- Object Oriented Programming (CO212)
Unit 4 – Templates and Exception Handling
Topic – 4.1 Function Templates, Overloading Function Templates

DEPARTMENT OF COMPUTER ENGINEERING , SCOE,KOPARGAON 2
Introduction
 Template enable us to define generic classes and
functions and provides support for generic
programming.
 Generic programming is
where generic types
an approach
are used as
that they
parameters in algorithms so
work for a variety of data types.

Introduction
 A template can be used to create a family of classes or functions.
 For eg: a class template for an array class would enable us to
create arrays of various data types such as: int, float etc.
 Templates are created as parameterized class templates or function
templates.

Function Template
 Function templates are used to create a
family of functions with different argument
types.
 Syntax:
template <class T>
returntype functionname (arguments of type T)
{
………..
………..
}
T it is Datatype on which class is working on

Function Template
#include <iostream>
using namespace std;
template<class T>
T add(T a, T b)
{
T result = a+b;
return result;
}
int main()
{
int i =2;
int j =3;
float m = 2.3;
float n = 1.2;
cout<<"Addition of i and j is :"<<
add(i,j);
cout<<'n';
cout<<"Addition of m and n is :"
<<add(m,n);
return 0;
}

Function Template with Multiple Parameters
 We can have more than one generic data
type in the function template.
template < class T1, class T2>
returntype functionname(arguments of type T1, T2…)
{
…….. (Body of function)
………
}

Function Template with Multiple Parameters
template <class T1, class T2>
void display(T1 x, T2 y)
{
cout<<x <<“ “ << y << “n”;
}
int main()
{
display(1999, “XYZ”);
display (12.34, 1234);
return 0;
}
Output:
1999 XYZ
12.34 1234

Overloading of Function Template
 A template function may be overloaded either by
template functions or ordinary functions of its name.
 The overloading is accomplished as follows:
 Call an ordinary function that has an exact match.
 Call a template function that could be created with an exact
match.
 Try normal overloading to ordinary function and call the one
that matches.

Overloading of Template Functions
template < class T>
void display(T x) //Generic Function
{
cout<<“Template Display : “ << x << “n”;
}
void display(int x) // Ordinary Function
{
cout << “Explicit Display: “ << x << “n”;
}
int main()
{
display(100);
display(12.34);
display(‘C’);
return 0;
}
Output:
Explicit Display:100
Template Display :12.34
Template Display :C

Non-Type Template Arguments
 It is also possible to use non-type arguments.
 In addition to the type argument T, we can also use other
arguments such as strings, int, float, built-in types.
 Example:
template <class T, int size>
class array
{
T a[size];
……..
………
};
Class T is generic class it can be int, float, char.

Thank You..

4.1 Function Templates,Overlaoding Function Templates.pptx

More Related Content

Similar to 4.1 Function Templates,Overlaoding Function Templates.pptx (20)

Recently uploaded (20)

4.1 Function Templates,Overlaoding Function Templates.pptx