templarzq的专栏

#include #include using namespace std; using namespace __gnu_cxx; #define FLT_EPSILON 1.192093e-007 #define DBL_EPSILON 2.2204460492503131e-016 #define FLOAT_EPSILON(a,b) ( a > b ? fabs(a) * FLT_EP

BKDR Hash unsigned int BKDRHash(char *str) { unsigned int seed = 131; // 31 131 1313 13131 131313 etc.. unsigned int hash = 0; while (*str) { hash = hash * seed + (*str++);