Function Template with Multiple Parameters

Like template classes, we can use more than one generic data types in the function template.

The general format is:

template <class T1,   class T2…….>           return_type   function_name (arguments of types T1, T2…..)             {                     Body of the function;

               }

/*1.Program to illustrate function template with multiple parameters */

#include<iostream.h>

template <class T1, class T2>          

void  display (T1  x , T2  y)
{
           cout << x << ” & ”<< y<<endl;
}
int  main( )
{
        display(“TARAK”,”JAGADEESH”);
        display (‘G’,10.5);
        display (99.5,200);
        return 0;
}

Output:

            TARAKA  &  JAGADEESH

            G & 10.5

            99.5 & 200

           In the above example the place holder types T1 and T2 are replaced by the string, string and char, float and float, int respectively, when the compiler generates specific instances of  display( ) within main( ).

/*2)Program to illustrate function template with multiple parameters */

#include<iostream.h>

template <class T1, class T2>

void  sum(T1  x , T2  y)

{

          cout << x + y<<endl;

}

int  main( )

{

        cout<<”The sum of int  and float no is:”;

        sum( 4 , 10.6 );

        cout<<”The sum of float and int no is:”;

        sum( 8.35 , 20 );

        return 0;
}

Output:

            The sum of int  and float no is: 14.6

            The sum of float  and int no is: 28.35