90% of /prog/ cannot write this BASIC PROGRAM

Task: Using your language of choice, implement a program that will a) Prompt the user for 2 numbers, and b) output the number of prime numbers between the two numbers (inclusive.)

Output: A B N

>>10
how would your haskell do this?
main(){for(int c;c;printf(++c?" %02x ":"\n",c=getchar()));}