View Compilation Error

0_0_14535886_21271.cpp: In function 'int main()':
0_0_14535886_21271.cpp:21:3: error: 'v' was not declared in this scope
   v.clear()
   ^
0_0_14535886_21271.cpp:22:22: error: expected ';' before ')' token
    for(i=1;i*i<=b;i++)
                      ^
0_0_14535886_21271.cpp:40:1: error: expected '}' at end of input
 }
 ^
0_0_14535886_21271.cpp:40:1: error: expected '}' at end of input