Software engineering + code c++

1- Write a test driven function to find a function that finds an element in array and returns the index. The
program should have a test class which runs a test_find() method that tests your function under varying sizes
of arrays and find target integers within and not contained within the array. do it simple and easy in c++
program
2- Develop a dry run for an algorithm that searches through an array for a value and returns the index if found
otherwise returns -1.