View Compilation Error

0_0_4491026_32380.cpp: In function `int Kruscal()':
0_0_4491026_32380.cpp:42: error: `y' undeclared (first use this function)
0_0_4491026_32380.cpp:42: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4491026_32380.cpp:42: error: `x' undeclared (first use this function)