Swap data using function template

Write a C++ Program to Swap data using function template. Here’s a Simple C++ Program to Swap data using function template in C++ Programming Language.

What are Templates in C++ ?

Templates are the foundation of generic programming, which involves writing code in a way that is independent of any particular type.

A template is a blueprint or formula for creating a generic class or a function. The library containers like iterators and algorithms are examples of generic programming and have been developed using template concept.

There is a single definition of each container, such as vector, but we can define many different kinds of vectors for example, vector <int> or vector <string>..

Function Template :

The general form of a template function definition is shown here:

template <class type> ret-type func-name(parameter list)

{
// body of function
}

Class Template :

Just as we can define function templates, we can also define class templates. The general form of a generic class declaration is shown here:

template <class type> class class-name

{
.
.
.
}

Below is the source code for C++ Program to Swap data using function template which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

/* C++ Program to Swap data using function template  */

#include <iostream>
using namespace std;

template <typename T>
void Swap(T &n1, T &n2)
{
        T temp;
        temp = n1;
        n1 = n2;
        n2 = temp;
}

int main()
{
        int i1 = 6, i2 = 3;
        float f1 = 7.2, f2 = 4.5;
        char c1 = 'p', c2 = 'x';

        cout << "Before passing data to function template.\n";
        cout << "i1 = " << i1 << "\ni2 = " << i2;
        cout << "\nf1 = " << f1 << "\nf2 = " << f2;
        cout << "\nc1 = " << c1 << "\nc2 = " << c2;

        Swap(i1, i2);
        Swap(f1, f2);
        Swap(c1, c2);

        cout << "\n\nAfter passing data to function template.\n";
        cout << "i1 = " << i1 << "\ni2 = " << i2;
        cout << "\nf1 = " << f1 << "\nf2 = " << f2;
        cout << "\nc1 = " << c1 << "\nc2 = " << c2;

        return 0;
}

OUTPUT : :

/* C++ Program to Swap data using function template */

Before passing data to function template.
i1 = 6
i2 = 3
f1 = 7.2
f2 = 4.5
c1 = p
c2 = x

After passing data to function template.
i1 = 3
i2 = 6
f1 = 4.5
f2 = 7.2
c1 = x
c2 = p 
Exit code: 0 (normal program termination)

Above is the source code and output for C++ Program to Swap data using function template which is successfully compiled and run on Windows System to produce desired output.

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