For this assignment, you will need to develop a simple program in C. The program val should process argv and argc parameters to main()to perform a simple operation on a sequence of numbers.

- If the first argument to the program is -m the program should multiply the sequence of numbers.

For example: val -m 4 5 32 44 should output the value 28160

- If the first argument is not -m, then the program should add the sequence of numbers.

You should also include some amount of error checking for invalid inputs.

For example: val 4 5 32 44 should output the value 85