Overloading of Template Functions

Overloading of Template Functions

•  Overloading a function means we can have same name to the function but different parameters. When we overload a template function ‒

1. We write a general template function

2. Another template function with different parameters

3. Or a regular function that takes precedence in specific cases.

•  Following C++ program shows how to overload template function ‒

#include <iostream>

using namespace std;

template<typename T>

T add(T a,T b) {

      return a+b;

}

template<typename T>

T add(T a,T b,T c){

      return a+b+c;

}

int main()

{

      cout<<add(10,20)<<endl;

      cout<<add(10,20,30);

      return 0;

}

Output

30

60

Example:1

Create a function template called 'add' that takes two arguments of the same type and returns their sum. This template should work for integers, floating‒point numbers and other types that support the + operator. In addition to the template, write a normal (non‒template) function add that specifically handles string concatenation.

Solution :

#include<iostream>

using namespace std;

string add(string s1,string s2){

     cout<<"Normal Function"<<endl;

     return s1+s2;

}

template<typename T>

T add(T a,T b){

     cout<<"Template Function"<<endl;

     return a+b;

}

int main() {

     cout<<add(2,3)<<endl;

     cout<<add(10.20,11.22)<<endl;

     cout<<add(string("Jay "),string(" Hind!!!"))<<<endl;

     return 0;

}

Output

Template Function

5

Template Function

21.42

Normal Function

Jay Hind!!!