View Compilation Error

0_0_6466179_9848.cpp:4: error: expected `,' or `;' before '{' token
0_0_6466179_9848.cpp: In function `int main()':
0_0_6466179_9848.cpp:28: error: `f' cannot be used as a function
0_0_6466179_9848.cpp:29: error: `f' cannot be used as a function
0_0_6466179_9848.cpp:30: error: `f' cannot be used as a function