/in/foo.c: In function 'main':
/in/foo.c:9:16: error: stray '\357' in program
  for(i=2;i<=x-1）;)
                ^
/in/foo.c:9:17: error: stray '\274' in program
  for(i=2;i<=x-1）;)
                 ^
/in/foo.c:9:18: error: stray '\211' in program
  for(i=2;i<=x-1）;)
                  ^