View Compilation Error

0_0_2983600_8421.cpp: In member function `void DD::update(int)':
0_0_2983600_8421.cpp:21: error: `dd' undeclared (first use this function)
0_0_2983600_8421.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2983600_8421.cpp: At global scope:
0_0_2983600_8421.cpp:25: error: `DD dd[700000]' used prior to declaration