View Compilation Error

0_0_10741354_17791.cpp: In function `int main()':
0_0_10741354_17791.cpp:43: error: `n' undeclared (first use this function)
0_0_10741354_17791.cpp:43: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10741354_17791.cpp:57: error: `sum' undeclared (first use this function)