/in/foo.cc: In function 'bool isZhiShu(int)':
/in/foo.cc:7:21: error: expected primary-expression before '||' token
    return(a%2!=0&&a%||a/2!=0);
                     ^~
/in/foo.cc:12:13: error: 'ture' was not declared in this scope
      return ture;
             ^~~~