/in/foo.cc:14:27: warning: character constant too long for its type
                     cout<<'Right';
                           ^~~~~~~
/in/foo.cc:3:1: error: 'string' does not name a type
 string isbn;
 ^~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:26:24: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
            if(d>=0&&d<=9)
                        ^
/in/foo.cc:28:23: error: invalid operands of types 'int [16]' and 'int' to binary 'operator*'
             j++;tot+=d*j;
                      ~^~