我可以看到几个问题:

1)当您将stackPtr的地址传递给push函数时，printStack(&stack);应该为printStack(stackPtr);.

1) printStack(&stack); should be printStack(stackPtr); as you are passing address of stackPtr to the push function.

2)

node = (StackNodePtr)malloc(sizeof(StackNodePtr));

应为:

node = malloc(sizeof(StackNode));

3)

push(stackPtr, 'a');

应为:

push(&stackPtr, 'a');

您需要传递顶部指针的地址.

As you need to pass the address of the top pointer.