Sequence Accumulation Write a function

that forms and returns the sum of all items in the vector v passed to it. For example, if T is a numeric type such as int or double, the numeric sum will be returned, and if T represents the STL string type, then the result of concatenation is returned. Test your function with a driver program that asks the user to enter 3 integers, uses accum to compute the sum, and prints out the sum. The program than asks the user to enter 3 strings, uses accum to concatenate the strings, and prints the result.