foo.cc: In function ‘int main()’:
foo.cc:13:12: error: expected ‘;’ before ‘{’ token
   13 |         sum{0};
      |            ^
      |            ;
foo.cc:13:9: warning: statement has no effect [-Wunused-value]
   13 |         sum{0};
      |         ^~~
foo.cc:14:21: error: expected ‘;’ before ‘{’ token
   14 |                 maxx{0};
      |                     ^
      |                     ;
foo.cc:14:17: warning: statement has no effect [-Wunused-value]
   14 |                 maxx{0};
      |                 ^~~~