View Compilation Error

0_0_4665569_7566.cpp: In member function `void Tree::Update()':
0_0_4665569_7566.cpp:32: error: `T' undeclared (first use this function)
0_0_4665569_7566.cpp:32: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4665569_7566.cpp: At global scope:
0_0_4665569_7566.cpp:50: error: `Tree T[8800]' used prior to declaration