如何使用空指针通过多层将多个结构作为同一参数传递

typedef struct {
    int data;
    struct Struct2* next;
} Struct1;

typedef struct {
    float value;
    struct Struct3* next;
} Struct2;

typedef struct {
    char name[20];
    struct Struct4* next;
} Struct3;

typedef struct {
    double amount;
    struct Struct4* next;
} Struct4;

Struct1* struct1 = (Struct1*)malloc(sizeof(Struct1));
struct1->data = 123;

Struct2* struct2 = (Struct2*)malloc(sizeof(Struct2));
struct2->value = 3.14;
struct1->next = struct2;

Struct3* struct3 = (Struct3*)malloc(sizeof(Struct3));
strcpy(struct3->name, "Hello");
struct2->next = struct3;

Struct4* struct4 = (Struct4*)malloc(sizeof(Struct4));
struct4->amount = 99.99;
struct3->next = struct4;

// 最后一个结构体的指针为空指针
struct4->next = NULL;

Struct1* current = struct1;
while (current != NULL) {
    printf("Data: %d\n", current->data);
    current = current->next;
}

Struct2* current2 = struct1->next;
while (current2 != NULL) {
    printf("Value: %.2f\n", current2->value);
    current2 = current2->next;
}

Struct3* current3 = struct1->next->next;
while (current3 != NULL) {
    printf("Name: %s\n", current3->name);
    current3 = current3->next;
}

Struct4* current4 = struct1->next->next->next;
while (current4 != NULL) {
    printf("Amount: %.2f\n", current4->amount);
    current4 = current4->next;
}