View Compilation Error

0_0_3320961_25249.cpp: In member function `void DD::update(int)':
0_0_3320961_25249.cpp:26: error: `dd' undeclared (first use this function)
0_0_3320961_25249.cpp:26: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3320961_25249.cpp: In member function `void DD::push_down(int)':
0_0_3320961_25249.cpp:35: error: `dd' undeclared (first use this function)
0_0_3320961_25249.cpp: At global scope:
0_0_3320961_25249.cpp:38: error: `DD dd[1000050]' used prior to declaration