foo.cc: In function ‘int main()’:
foo.cc:7:16: warning: unnecessary parentheses in declaration of ‘i’ [-Wparentheses]
    7 |         for(int(i)=n;i<=n;i++)
      |                ^~~
foo.cc:7:16: note: remove parentheses
    7 |         for(int(i)=n;i<=n;i++)
      |                ^~~
      |                - -