C pointer pointer, and seg fault

Question

Below is my simple linked list in C. My question is in \"headRef = &newNode;\" which causes segmentation fault. Then I tried instead \"*headRef = newNode;\" which resolves the s

Answer 1

headRef = &newNode is a local assignment, so the assignment is only valid within the scope of Push function. If changes to the headRef should be visible outside the Push you need to do *headRef = newNode. Furthermore, these two are not equivalent. headRef = &newNode assigns the address of a node pointer to a pointer to node pointer while the *headRef = newNode assigns the address of a node to a pointer to a node using indirection.