C++ :: Creating Flexible Interface For CL Application - Auto Return Type?

I am trying to create a flexible interface for my CL application. And what i have is this :

Code:
using namespace std;
// iplcp -i queryFile -d databaseFile
template <typename INT, typename CHARA>
class API {

vector<string> files;
vector<INT> flags;

[Code] ....

and in main :

int main(int argc, char **argv){
//set variables
API<int, char**>args(argc,argv);
cout << "In file: "<< args.GetOpt("i") << " Db file: " << args.GetOpt("h") << endl;
}

// first thing to be printed should be string and the second int

I know this is not probably the best way to but i am laying around and was curious if something like this could work . Are there any good C++ templates for CLI applications from which i could learn?