/in/foo.cc: In function 'int main()':
/in/foo.cc:7:7: error: lvalue required as left operand of assignment
  n%10=c;
       ^
/in/foo.cc:8:8: error: lvalue required as left operand of assignment
  n/100=a;
        ^
/in/foo.cc:9:10: error: lvalue required as left operand of assignment
  n/10%10=b;
          ^