Code Golf: Numeric Ranges

Answer 1

C++, 166 characters

#define o std::cout
void f(std::vector v){for(int i=0,b=0,z=v.size();iv[i]+1?b?o<<", ":o,(i-b?o<1?" - ":", "):o)<

Don't you all just love abusing the ?: operator? ;)

More readable version:

#define o std::cout
void f(std::vector v){
    for(int i=0,b=0,z=v.size();iv[i]+1 ?
            b?o<<", ":o,
            (i-b?o<1?" - ":", "):o)<