View Compilation Error

0_0_6599194_11937.cpp:4: error: expected unqualified-id before '-' token
0_0_6599194_11937.cpp:4: error: expected `,' or `;' before '-' token
0_0_6599194_11937.cpp: In function `int main()':
0_0_6599194_11937.cpp:22: error: `f' undeclared (first use this function)
0_0_6599194_11937.cpp:22: error: (Each undeclared identifier is reported only once for each function it appears in.)