View Compilation Error

0_0_17627764_2512.cpp:2:1: error: expected unqualified-id before numeric constant
 8
 ^
0_0_17627764_2512.cpp: In function 'int main()':
0_0_17627764_2512.cpp:7:1: error: 'f' was not declared in this scope
 f[1]=1;f[2]=1;
 ^