View Compilation Error

0_0_30219212_31958.cpp: In function 'int main()':
0_0_30219212_31958.cpp:13:3: error: expected ';' before 'for'
   for (int i=1;i<=(1<<n)-1;i++)
   ^
0_0_30219212_31958.cpp:13:16: error: 'i' was not declared in this scope
   for (int i=1;i<=(1<<n)-1;i++)
                ^