View Compilation Error

0_0_20799798_11577.cpp:2:1: error: 'x' does not name a type
 x = x * c / gcd;
 ^
0_0_20799798_11577.cpp:3:1: error: 'y' does not name a type
 y = (long long) ((c - 1.0 * a * x) / b);
 ^