View Compilation Error

0_0_6022702_32498.cpp: In function `int F(int)':
0_0_6022702_32498.cpp:5: error: `n' undeclared (first use this function)
0_0_6022702_32498.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6022702_32498.cpp:6: error: expected `;' before '}' token