View Compilation Error

0_0_2611882_11578.cpp: In function `int main()':
0_0_2611882_11578.cpp:96: error: `compare1' undeclared (first use this function)
0_0_2611882_11578.cpp:96: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2611882_11578.cpp:99: error: `compare2' undeclared (first use this function)
0_0_2611882_11578.cpp:102: error: `compare3' undeclared (first use this function)