Write a short C++ function that takes an array of int values and determines if there is a pair of numbers in the array whose product is even. Write a C++ function that takes an STL vector of int...

Write a short C++ function that takes an array of int values and determines

if there is a pair of numbers in the array whose product is even.

Write a C++ function that takes an STL vector of int values and determines if all the numbers are different from each other (that is, they are

distinct).