View Compilation Error

0_0_27806631_16656.cpp: In function 'int main()':
0_0_27806631_16656.cpp:4:2: error: 'nbsp' was not declared in this scope
     long n, a;
  ^
0_0_27806631_16656.cpp:10:29: error: 'else' without a previous 'if'
         else
                             ^