/in/foo.cc:10:5: error: stray '\357' in program
   10 |   if（len==0){
      |     ^
/in/foo.cc:10:6: error: stray '\274' in program
   10 |   if（len==0){
      |      ^
/in/foo.cc:10:7: error: stray '\210' in program
   10 |   if（len==0){
      |       ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:10:8: error: expected '(' before 'len'
   10 |   if（len==0){
      |        ^~~
      |        (