View Compilation Error

0_0_33538101_27038.cpp: In function 'long double get(long long int, long long int)':
0_0_33538101_27038.cpp:27:16: error: 'struct node' has no member named 'b'
  return (li[x].b-li[y].b)/(li[y].k-li[x].k);
                ^
0_0_33538101_27038.cpp:27:24: error: 'struct node' has no member named 'b'
  return (li[x].b-li[y].b)/(li[y].k-li[x].k);
                        ^
0_0_33538101_27038.cpp: In function 'int main()':
0_0_33538101_27038.cpp:49:25: error: 'struct node' has no member named 'b'
     li[cnt].k=k,li[cnt].b=b;
                         ^
0_0_33538101_27038.cpp:55:20: error: 'struct node' has no member named 'b'
   li[n].k=-1,li[n].b=0,li[n].w=1;
                    ^
0_0_33538101_27038.cpp:66:50: error: 'struct node' has no member named 'b'
   for(int i=1;i<=cnt;i++) li[i].k=li[i].id=li[i].b=li[i].w=0; 
                                                  ^