266.88 points

Without typo:

#define in #include<cstdlib> 

With typo:

#define int #include<cstdlib> 

Errors: on Ideone, 31486 bytes. On my Ubuntu machine, g++-4.9, 30959 bytes with a filename of a.cc. Only 29 bytes of code (with typo). With my machine, that's a score of 30959/29/4 = 266.88.