View Compilation Error

0_0_4938630_10283.cpp:8: error: `NULL' was not declared in this scope
0_0_4938630_10283.cpp: In constructor `node<T>::node()':
0_0_4938630_10283.cpp:7: error: `NULL' undeclared (first use this function)
0_0_4938630_10283.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4938630_10283.cpp: In function `void OutOfRange()':
0_0_4938630_10283.cpp:35: error: `cout' undeclared (first use this function)
0_0_4938630_10283.cpp:35: error: `endl' undeclared (first use this function)
0_0_4938630_10283.cpp: In member function `void linkList<T>::traverse()':
0_0_4938630_10283.cpp:153: error: `cout' undeclared (first use this function)
0_0_4938630_10283.cpp:160: error: `endl' undeclared (first use this function)