https://www.udemy.com/c-for-technical-interview/?couponCode=for_udemy_friends
Update:
https://www.udemy.com/c-for-technical-interview/?couponCode=CXZ000D

https://www.udemy.com/c-for-technical-interview/?couponCode=bigone
If you don't mind spending One Dollar for a thorough 'C' language course ,with 58 '5 star' ratings and over 12.5 hours of Video content this coupon is for you.
If not, my apologies; consider this a bump for a free coupon :)
Thanks Alekxis88 for the original share, and Y0gendr for the 1.00 coupon info. I agree, 1.00 is worth 112 lectures and 12.5 hours of videos.
+5 Reps Added for both of you, Many Thanks!
Mushin
New Free Coupon Finally :)
https://www.udemy.com/c-for-technical-interview/?couponCode=BESTC0
New coupon:
https://www.udemy.com/c-for-technical-interview/?couponCode=CXZ000D