CareerCup

wtf?

yah wtf

yah wtf

I would use switch cases.. Then a default one if the inputs were a different one from the allowed ones..

Wat about Regular Expressions... I think it would be easier than switch cases...

What about std::map?

//data structure we need
map<char*, string> opts1; //the opts which take arguments
map<char*, int> opts2; //the opts which doesn't need arguments, e.g, -R

//algorithm
step 1: first insert all the legal opts into two maps
step 2: parse the input, if illegal or duplicate opts found, return false
step 3: set the corresponding value