/in/foo.cc: In function 'int integer(int, int)':
/in/foo.cc:11:25: error: invalid operands of types 'int' and '__gnu_cxx::__promote_2<int, int, double, double>::__type {aka double}' to binary 'operator%'
   integers[i-1]=(num-num%pow(10,i-1))/pow(10,i-1);//求每一位上的数
                      ~~~^~~~~~~~~~~~