View Compilation Error

0_0_3840953_13446.cpp:10: error: size of array `tree' is too large
0_0_3840953_13446.cpp: In function `void init()':
0_0_3840953_13446.cpp:16: error: `tree' undeclared (first use this function)
0_0_3840953_13446.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3840953_13446.cpp: In function `int search(char*)':
0_0_3840953_13446.cpp:25: error: `tree' undeclared (first use this function)
0_0_3840953_13446.cpp: In function `void insert(char*)':
0_0_3840953_13446.cpp:44: error: `tree' undeclared (first use this function)