View Compilation Error

0_0_4975921_14302.cpp: In function `int main()':
0_0_4975921_14302.cpp:12: error: `Y' undeclared (first use this function)
0_0_4975921_14302.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4975921_14302.cpp:12: error: expected `;' before "scanf"