foo.cc: In function ‘int main()’:
foo.cc:8:31: error: expected ‘)’ before ‘）’
    8 |         for(int x=2; x<=n; x++）
      |            ~                  ^~
      |                               )
foo.cc:8:31: error: ‘）’ was not declared in this scope
    8 |         for(int x=2; x<=n; x++）
      |                               ^~