View Compilation Error

0_0_18058691_6818.cpp:128:5: error: field 'sgt' has incomplete type 'SGT'
 SGT sgt;
     ^
0_0_18058691_6818.cpp:163:1: error: expected '}' at end of input
 }
 ^
0_0_18058691_6818.cpp:163:1: error: expected unqualified-id at end of input