C programming:

Write a function that takes two arrays as input, calculates the dot product of these two inputs, and return the result as a double.

To calculate the dot product of a vector, you should multiply each corresponding element in the two vectors, then add these values. For example, the dot product of [ 3, 8, 2 ] and [ 2, 2, 9 ] is 3*2 + 8*2 + 2*9 = 40.

Please test the program twice, once with objects that collide, once with objects that won't.