错误C3861：'initNode'：未找到标识符

Question

下面是编译错误：

错误C3861：'initNode'：标识符未找到“

以下是代码：

# include <conio.h>
# include "stdafx.h"
# include <stdlib.h>

struct node{
    node * next;
    int nodeValue;

};

node*createList (int value)  /*Creates a Linked-List*/
{
    node *dummy_node = (node*) malloc(sizeof (node));
    dummy_node->next=NULL;
    dummy_node->nodeValue = value;
    return dummy_node;
}


void addFront (node *head, int num ) /*Adds node to the front of Linked-List*/
{
    node*newNode = initNode(num);   
    newNode->next = NULL;
    head->next=newNode;
    newNode->nodeValue=num;
}

void deleteFront(node*num)   /*Deletes the value of the node from the front*/
{
    node*temp1=num->next;

    if (temp1== NULL) 
    {
        printf("List is EMPTY!!!!");
    }
    else
    {
        num->next=temp1->next;
        free(temp1);
    }

}

void destroyList(node *list)    /*Frees the linked list*/
{
    node*temp;
    while (list->next!= NULL) 
    {
        temp=list;
        list=temp->next;
        free(temp);
    }
    free(list);
}

int getValue(node *list)    /*Returns the value of the list*/
{
    return((list->next)->nodeValue);
}


void printList(node *list)   /*Prints the Linked-List*/
{

    node*currentPosition;
    for (currentPosition=list->next; currentPosition->next!=NULL; currentPosition=currentPosition->next)  
    {`enter code here`
        printf("%d \n",currentPosition->nodeValue);
    }   
    printf("%d \n",currentPosition->nodeValue);

}

node*initNode(int number) /*Creates a node*/
{
    node*newNode=(node*) malloc(sizeof (node));
    newNode->nodeValue=number;
    newNode->next=NULL;
    return(newNode);
}

如何修复此错误？

Answer 1

发生此错误是因为在调用initNode()之前它是不可见的。若要更正initNode()的声明，或将其定义移动到第一次使用之前。

代码看起来像C，但是您似乎正在使用C++编译器来编译它(因为使用node而不是struct node似乎不会导致编译器失败，除非您在文章中没有报告这些错误)。如果使用C编译器(可以通过使用Visual在源文件上使用.c扩展名轻松实现)，则不需要强制转换malloc()的返回值。参见Incompatibilities Between ISO C and ISO C++ ，在回答问题What issues can I expect compiling C code with a C++ compiler?时找到的链接