View Compilation Error

0_0_27060450_19262.cpp:9:3: error: stray '#' in program
          dd+=a[i];
   ^
0_0_27060450_19262.cpp:9:10: error: stray '#' in program
          dd+=a[i];
          ^
0_0_27060450_19262.cpp:9:17: error: stray '#' in program
          dd+=a[i];
                 ^
0_0_27060450_19262.cpp: In function 'int main()':
0_0_27060450_19262.cpp:9:4: error: lvalue required as unary '&' operand
          dd+=a[i];
    ^
0_0_27060450_19262.cpp:9:11: error: lvalue required as unary '&' operand
          dd+=a[i];
           ^
0_0_27060450_19262.cpp:9:18: error: lvalue required as unary '&' operand
          dd+=a[i];
                  ^