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