View Compilation Error

0_0_23638854_4782.cpp:1:1: error: expected unqualified-id before 'for'
 for (int i=1;i<=n;i++)
 ^
0_0_23638854_4782.cpp:1:14: error: 'i' does not name a type
 for (int i=1;i<=n;i++)
              ^
0_0_23638854_4782.cpp:1:19: error: 'i' does not name a type
 for (int i=1;i<=n;i++)
                   ^
0_0_23638854_4782.cpp:2:15: error: 'v' does not name a type
  for (int v=V;v>0;v--)
               ^
0_0_23638854_4782.cpp:2:19: error: 'v' does not name a type
  for (int v=V;v>0;v--)
                   ^