View Compilation Error

0_0_13671058_6704.cpp:46:10: error: variable or field 'prin' declared void
     void prin
          ^
0_0_13671058_6704.cpp:46:10: error: expected ';' at end of member declaration
0_0_13671058_6704.cpp:46:10: error: expected '}' at end of input
0_0_13671058_6704.cpp:20:46: error: expected unqualified-id at end of input
     BigNum(){ len = 1;memset(a,0,sizeof(a)); }   //构造函数  
                                              ^