View Compilation Error

625450_0_0_3394.cpp: In member function `void node::newnode(int, int)':
625450_0_0_3394.cpp:17: error: `ns' undeclared (first use this function)
625450_0_0_3394.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
625450_0_0_3394.cpp: At global scope:
625450_0_0_3394.cpp:56: error: `node ns[200000]' used prior to declaration