Sum an Array with a Template

Write a function template sumArray(const T values[], int size) that returns the total of the first size elements as a T. Start the total at T{} (the zero value of the type) and add each element with a loop. When size is 0, return that starting total without touching the array.

The tests read a count and that many int values, print their sum, then read a count and that many double values, print their sum, and finally call sumArray on the int array with a size of 0 and print that result too, each on its own line. For the first test the input is 3, then 4 5 6, then 2, then 1.5 2.25.

Do NOT write a main function.