/in/foo.c: In function 'main':
/in/foo.c:6:5: warning: 'main' is normally a non-static function [-Wmain]
 int main(void)
     ^~~~
/in/foo.c: In function 'main':
/in/foo.c:10:40: error: stray '\357' in program
  sum=sum/10+sum/100+sum/1000+sum/10000+（sum/10）+(sum%10)/5+sum/100+(sum%100)/25+sum/1000+(sum%1000)/625;
                                        ^
/in/foo.c:10:41: error: stray '\274' in program
  sum=sum/10+sum/100+sum/1000+sum/10000+（sum/10）+(sum%10)/5+sum/100+(sum%100)/25+sum/1000+(sum%1000)/625;
                                         ^
/in/foo.c:10:42: error: stray '\210' in program
  sum=sum/10+sum/100+sum/1000+sum/10000+（sum/10）+(sum%10)/5+sum/100+(sum%100)/25+sum/1000+(sum%1000)/625;
                                          ^
/in/foo.c:10:49: error: stray '\357' in program
  sum=sum/10+sum/100+sum/1000+sum/10000+（sum/10）+(sum%10)/5+sum/100+(sum%100)/25+sum/1000+(sum%1000)/625;
                                                 ^
/in/foo.c:10:50: error: stray '\274' in program
  sum=sum/10+sum/100+sum/1000+sum/10000+（sum/10）+(sum%10)/5+sum/100+(sum%100)/25+sum/1000+(sum%1000)/625;
                                                  ^
/in/foo.c:10:51: error: stray '\211' in program
  sum=sum/10+sum/100+sum/1000+sum/10000+（sum/10）+(sum%10)/5+sum/100+(sum%100)/25+sum/1000+(sum%1000)/625;
                                                   ^
/in/foo.c:8:9: warning: unused variable 'n' [-Wunused-variable]
     int n;
         ^
At top level:
/in/foo.c:6:5: warning: 'main' defined but not used [-Wunused-function]
 int main(void)
     ^~~~