View Compilation Error

0_0_20973876_23576.cpp: In function 'void Delete(int, int, int)':
0_0_20973876_23576.cpp:3:9: error: 'Node' was not declared in this scope
         Node *p1;
         ^
0_0_20973876_23576.cpp:3:15: error: 'p1' was not declared in this scope
         Node *p1;
               ^
0_0_20973876_23576.cpp:5:20: error: 'null' was not declared in this scope
         Select(pos,null);
                    ^
0_0_20973876_23576.cpp:5:24: error: 'Select' was not declared in this scope
         Select(pos,null);
                        ^
0_0_20973876_23576.cpp:6:26: error: 'root' was not declared in this scope
         Select(pos+cnt+1,root);
                          ^
0_0_20973876_23576.cpp:14:30: error: 'Splay' was not declared in this scope
         Splay(root->c[1],null);
                              ^