This function receives first_name and last_name, then prints a formatted string of "Name: last_name, first_name" if both names are not blank, or "Name: " with just one of the names, if the other one is blank, and nothing if both are blank.

Following are the program in the C+ + Programming Language.

//set header file

#include

//set namespace

using namespace std;

//define class

class format

{

//set access modifier

public:

//set string type variable

string res;

//define function

void names (string first_name, string last_name)

{

//set if-else if condition to check following conditions

if (first_name. length () >0 && last_name. length () >0)

{

res="Name: "+last_name+", "+first_name;

}

else if (first_name. length () >0 and last_name. length () = =0)

{

res="Name: "+first_name;

}

else if (first_name. length () = =0 and last_name. length () = =0)

{

res="";

}

}

//define function to print result

void out () {

cout<
}

};

//define main method

int main () {

//set objects of the class

format ob, ob1, ob2;

//call functions through 1st object

ob. names ("John","Morris");

ob. out ();

//call functions through 2nd object

ob1. names ("Jhon","");

ob1. out ();

//call functions through 3rd object

ob2. names ("", "");

ob2. out ();

}

Output:

Name: Morris, John

Name: Jhon

Explanation:

Following are the description of the program:

Define class "format" and inside the class we define two void data type function. Define void data type function "names () " and pass two string data type arguments in its parameter "first_name" and "last_name" then, set the if-else conditional statement to check that if the variable 'first_name' is greater than 0 and 'last_name' is also greater than 0 then, the string "Name" and the following variables added to the variable "res". Then, set else if to check that if the variable 'first_name' is greater than 0 and 'last_name' is equal to 0 then, the string "Name" and the following variable "first_name" added to the variable "res". Define void data type function "out () " to print the results of the variable "res". Finally, we define main method to pass values and call that functions.