Create a function, int get_num_ints(char** argv) using C.

This function takes in the two input file names (stored in argv) and determines the number of integers in each file. If the two files both have N integers, return N, otherwise return -1.

If one or both of the files do not exist, it should exit with EXIT_FAILURE.

input parameters:

char** argv

return parameters:

-1 if the two input files have different number of integers

N if the two input files both have N integers

Do NOT hard-code the file names.