View Compilation Error

0_0_39704822_23615.cpp:4:15: error: expected ';' at end of member declaration
    4 |         int g,d
      |               ^
      |                ;
0_0_39704822_23615.cpp: In function 'N fun(int)':
0_0_39704822_23615.cpp:8:24: error: could not convert '0' from 'int' to 'N'
    8 |                 return 0;
      |                        ^
      |                        |
      |                        int
0_0_39704822_23615.cpp:11:10: error: expected ';' before 'nxt'
   11 |         n nxt;
      |          ^~~~
      |          ;
0_0_39704822_23615.cpp:12:9: error: 'nxt' was not declared in this scope
   12 |         nxt = g=las.g*3+las.d*2;
      |         ^~~
0_0_39704822_23615.cpp:12:15: error: 'g' was not declared in this scope
   12 |         nxt = g=las.g*3+las.d*2;
      |               ^