View Compilation Error

0_0_30406415_14286.cpp: In function 'void aStar(Node)':
0_0_30406415_14286.cpp:45:28: error: 'get_hash' was not declared in this scope
     end.hash = get_hash(end);
                            ^
0_0_30406415_14286.cpp:82:24: error: too many arguments to function 'void print()'
                 print(k);
                        ^
0_0_30406415_14286.cpp:34:6: note: declared here
 void print();
      ^
0_0_30406415_14286.cpp: In function 'void push(Node)':
0_0_30406415_14286.cpp:102:14: error: 'up' was not declared in this scope
     up(size-1);
              ^
0_0_30406415_14286.cpp: In function 'Node* pop()':
0_0_30406415_14286.cpp:107:36: error: invalid conversion from 'void*' to 'Node*' [-fpermissive]
     Node* res = malloc(sizeof(Node));
                                    ^
0_0_30406415_14286.cpp:119:11: error: too many arguments to function 'void down()'
     down(0);
           ^
0_0_30406415_14286.cpp:36:6: note: declared here
 void down();
      ^