View Compilation Error

0_0_5231202_24322.cpp: In function `int main()':
0_0_5231202_24322.cpp:58: error: `X' undeclared (first use this function)
0_0_5231202_24322.cpp:58: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5231202_24322.cpp:58: error: `Y' undeclared (first use this function)