View Compilation Error

0_0_13671056_2766.cpp:34:41: error: expected '}' at end of input
     BigNum operator^(const int  &) const;    //大数的n次方运算  
                                         ^
0_0_13671056_2766.cpp:20:46: error: expected unqualified-id at end of input
     BigNum(){ len = 1;memset(a,0,sizeof(a)); }   //构造函数  
                                              ^