View Compilation Error

290287_0_13795.cpp: In function `int main()':
290287_0_13795.cpp:17: error: `maxSum2' undeclared (first use this function)
290287_0_13795.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
290287_0_13795.cpp: In function `int maxSum2(int)':
290287_0_13795.cpp:40: error: `int maxSum2(int)' used prior to declaration