I am doing it on Linux with a gcc compiler 3.2

I am using alarm() to time a process. Is there something with which i can measure by milliseconds ? The alarm() in C++ allows only seconds and not anything lesser than that. I did try ftime() and time(),But i need something to timeout automatically. I am using RH linux and g++ 3.2 Thanks

Could some one give me the formula/algorithm for the following number Generation. The numbers being 1234 Thanks 1 2 3 4 12 13 14 23 24 34 123 124 134 234 1234