You are given a string of any length. Return a new string consisting of the first and last characters concatenated together. You cannot use the at () member function or the subscript operator []. If the is less than length 2, return the original string. main.cpp 1 #include 2 3 4 5 6 7 8 9 16 11 12 10 12 using namespace std; /** Returns a string consisting of the first and last characters. @param s the string to processes @return the first and last characters concatenated together. */ string firstLast (const string& s) { // Write your function here }

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Declaring and Defining the function

A set of statements, which performs a particular task is called a function. The program gains modularity by using function. The application is quite easy to understand, read, and edit when they are created with functions. The developer/programmer creates a function and uses main() to call the function. Once the function gets executed, the control is transferred to the main program.