foo.cc:9:22: error: stray '\357' in program
    9 |  for(int i=2;i<=n;i++）{
      |                      ^
foo.cc:9:23: error: stray '\274' in program
    9 |  for(int i=2;i<=n;i++）{
      |                       ^
foo.cc:9:24: error: stray '\211' in program
    9 |  for(int i=2;i<=n;i++）{
      |                        ^
foo.cc: In function 'int main()':
foo.cc:9:22: error: expected ')' before '{' token
    9 |  for(int i=2;i<=n;i++）{
      |     ~                ^  ~
      |                      )

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