View Compilation Error

0_0_30406427_24514.cpp: In function 'void aStar(Node)':
0_0_30406427_24514.cpp:84:24: error: too many arguments to function 'void print()'
                 print(k);
                        ^
0_0_30406427_24514.cpp:34:6: note: declared here
 void print();
      ^
0_0_30406427_24514.cpp: In function 'Node* pop()':
0_0_30406427_24514.cpp:109:36: error: invalid conversion from 'void*' to 'Node*' [-fpermissive]
     Node* res = malloc(sizeof(Node));
                                    ^