View Compilation Error

0_0_31809672_1701.cpp: In function 'int main()':
0_0_31809672_1701.cpp:34:3: error: 'f' was not declared in this scope
   f
   ^
0_0_31809672_1701.cpp:34:3: error: expected '}' at end of input
0_0_31809672_1701.cpp:34:3: error: expected '}' at end of input