Write a C++ program that declares an array alpha of 50 components of type double . Initialize the array so that the first 25 components are equal to the square of the index variable, and the last 25...

Write a C++ program that declares an array
alpha
of
50
components of type
double. Initialize the array so that the first 25 components are equal to the square of the index variable, and the last 25 components are equal to three times the index variable. Output the array so that 10 elements per line are printed. Use the array only and do not define any elements of the array in the program.  All elements must be typed by the user.  In the main program, only simple function calls will be allowed.