View Compilation Error

0_0_3826429_2247.cpp: In member function `int maxtree::query(int, int)':
0_0_3826429_2247.cpp:21: error: `odt' undeclared (first use this function)
0_0_3826429_2247.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3826429_2247.cpp:24: error: `lowBit' undeclared (first use this function)
0_0_3826429_2247.cpp:25: error: `data' undeclared (first use this function)
0_0_3826429_2247.cpp: In member function `void maxtree::update(int, int)':
0_0_3826429_2247.cpp:38: error: `odt' undeclared (first use this function)
0_0_3826429_2247.cpp:39: error: `n' undeclared (first use this function)
0_0_3826429_2247.cpp:40: error: `data' undeclared (first use this function)
0_0_3826429_2247.cpp:41: error: `lowBit' undeclared (first use this function)
0_0_3826429_2247.cpp: At global scope:
0_0_3826429_2247.cpp:56: error: `int n' used prior to declaration