Hi I have to write a recursive function in C++ to do the following:

// Returns a string where the same characters next each other in

// string n are separated by "++"

//

// Pseudocode Example:

// pairPlus("goodbye") => "go++odbye"

// pairPlus("yyuu") => "y++yu++u"

// pairPlus("aaaa") => "a++a++a++a"

//

string pairPlus(string n)

{

}