View Compilation Error

0_0_13671054_184.cpp:22:24: error: expected '}' at end of input
     BigNum(const char*);     //½«Ò»¸ö×Ö·û´®À
                        ^
0_0_13671054_184.cpp:20:46: error: expected unqualified-id at end of input
     BigNum(){ len = 1;memset(a,0,sizeof(a)); }   //¹¹Ô캯Êý  
                                              ^