View Compilation Error

625232_0_0_23941.cpp: In member function `void node::newnode(int, int)':
625232_0_0_23941.cpp:17: error: `ns' undeclared (first use this function)
625232_0_0_23941.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
625232_0_0_23941.cpp: At global scope:
625232_0_0_23941.cpp:56: error: `node ns[200000]' used prior to declaration