View Compilation Error

0_0_32854214_20613.cpp: In function 'bool check(LL, LL)':
0_0_32854214_20613.cpp:6:22: error: 'quickpow' was not declared in this scope
  x = quickpow(a, m, n);  //快速幂
                      ^
0_0_32854214_20613.cpp: In function 'bool miller_rabin(int, int)':
0_0_32854214_20613.cpp:20:18: error: 'rand' was not declared in this scope
   if (check(rand() % (n - 1) + 1, n))
                  ^