View Compilation Error

0_0_33521453_2111.cpp: In function 'int main()':
0_0_33521453_2111.cpp:7:22: error: 'n' was not declared in this scope
  while (~scanf("%d",&n))
                      ^
0_0_33521453_2111.cpp:12:7: error: 'i' was not declared in this scope
   for(i=1;i<=n;i++)
       ^