View Compilation Error

0_0_39704842_14178.cpp: In function 'N fun(int)':
0_0_39704842_14178.cpp:13:10: error: expected ';' before 'nxt'
   13 |         n nxt;
      |          ^~~~
      |          ;
0_0_39704842_14178.cpp:14:9: error: 'nxt' was not declared in this scope
   14 |         nxt.g  las.g * 3 + las.d * 2;
      |         ^~~