View Compilation Error

0_0_4822040_4962.cpp:11: error: `NULL' was not declared in this scope
0_0_4822040_4962.cpp: In constructor `node<DataType>::node()':
0_0_4822040_4962.cpp:10: error: `NULL' undeclared (first use this function)
0_0_4822040_4962.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4822040_4962.cpp: In function `void OutOfRange()':
0_0_4822040_4962.cpp:38: error: `cout' undeclared (first use this function)
0_0_4822040_4962.cpp:38: error: `endl' undeclared (first use this function)
0_0_4822040_4962.cpp: In member function `void LinkList<DataType>::traverse()':
0_0_4822040_4962.cpp:145: error: `cout' undeclared (first use this function)
0_0_4822040_4962.cpp:152: error: `endl' undeclared (first use this function)