Question

为什么我在insertNode()：

中收到此警告

warning: assignment from incompatible pointer type [enabled by default]|

在这一行：

 head->next = newNode; //point head's next to the newNode

和

warning: initialization from incompatible pointer type [enabled by default]|

在这一行：

 Node *current = head->next;

在我的main()函数中，我也有这个警告：

warning: passing argument 1 of 'insertNode' from incompatible pointer type [enabled by default]|

在这一行：

insertNode(&head, num);

我的代码中有一些类似于这些警告的其他人。我该如何解决这些问题？

 typedef struct NodeStruct{
      int data;
      struct Node *next;
 }Node;

void insertNode(Node *head, int data){
    Node *newNode = (Node *)malloc(sizeof(Node));
    newNode->data = data;

    if(head->next == NULL){
        head->next = newNode; 
        newNode->next = NULL;
    }

    else{
        Node *current = head->next; 
        while(current != NULL && current->data < data){
            current = current->next;
        }
        newNode->next = current->next;
        current->next = newNode; 
    }
}

int main(int argc, char *argv[])
{
    Node *head = malloc(sizeof(NodeStruct));
    head->next = null;
    insert(head, 22);
    insert(head, 55);
    insert(head, 44);
    insert(head, 2);
    insert(head, 2112);
    insert(head, 3);


    printList(head);
    return 0;

}

Answer 1

在public class JNITest { static{ // System.load("/home/user1/ // JNI_project/mynativelib.so"); System.load("JNITest"); } // public native void LOSSGREENAMPT(TIMEINTERVAL, STARTINITIALLOSS,double ENDINITIALLOSS,double MOISTUREDEFICIT, double SUCTION,double CONDUCTIVITY, double STARTINFILTRATION,double FINALINFILTRATION, double IMPERVIOUSAREARATIO,int NUMBERPRECIP, double PRECIP(1),double EXCESS(1),int ERRORCODE[4], char ERRORMESSAGE[60],char L_errorMessage[60]); public static void main(String[] args) { JNITest test=new JNITest(); //test.greet(); } } -

main

预计insertNode(&head, num); ^ don't pass address，您应该这样称呼它 -

Node *

其他警告是由于上述错误，因为您传递insertNode(head, num);的地址而不是将head传递给函数。

同样在head更改此内容 -

struct NodeStruct

到 -

struct Node *next;         // you cannot reference Node in struct itself

从不兼容的指针类型分配[默认启用]

1 个答案: