#define RAND_MAX 0x7FFFU #define isspace(c) ((c)==' ') #define abs(i) (((i)<0)?(-(i)):(i)) #define random(num) ((rand()*(num))/((RAND_MAX+1))) void* malloc(unsigned size); void free(void *pointer); void* realloc(void* pointer, unsigned size); void srand (unsigned seed); int rand (void);