/in/foo.cc: In function 'int main()':
/in/foo.cc:8:9: error: expected ',' or ';' before 'for'
    8 |         for(int i=a;i<=b;i++)
      |         ^~~
/in/foo.cc:8:21: error: 'i' was not declared in this scope
    8 |         for(int i=a;i<=b;i++)
      |                     ^