View Compilation Error

0_0_37905893_5344.cpp: In function 'void work()':
0_0_37905893_5344.cpp:44:2: error: 'v' was not declared in this scope
  v[n+1]=0;
  ^
0_0_37905893_5344.cpp:46:10: error: expected primary-expression before ']' token
   v[i]=v[]
          ^