Loading ints specified in a string into an array

I'm doing an assignment for a C course I am in.

For part of the assignment I am loading integers that are specified in a string of characters into an array.

For example, if I have this string:
"1,5-7,12"
I want to load the numbers 1, 5, 6, 7, 12 into an array of integers.

I could probably do this with a large amount of code, but I am wondering if there is some function that will help me out a bit here. I figure sscanf isn't going to do much for me.

The main problem I see is with multi-digit integers, like 12. In the string it is stored as the two seperate characters '1' and '2', I would need to convert that into the integer 12.

I would really appreciate it if someone could give me an idea of the best way to go about this... thank you.

strtol will convert string to integr and provide pointer where the conversion was stopped, so you can continue parsing string from that point