#include<stdio.h>
#include<stdlib.h>
struct node *LinkListCreate();
struct node *BubbleSort(struct node *Header);
void print(struct node *Header);
struct node
{
    long int data;
    struct node *next;
};
int main()
{
    struct node *Header;
    Header = LinkListCreate();
    Header = BubbleSort(Header);
    print(Header);
    return 0;
}
struct node *LinkListCreate()
{
    struct node *Header = NULL;
    struct node *p1, *p2;
    int n = 0;
    char *string,*stopstring;
    p1 = (struct node *)malloc(sizeof(struct node));
    printf("Please input an integer number:\n");
    scanf("%s",string);  //实际输入当作字符串处理          这里出问题了，说string未初始化，但是不知道是怎么回事
    p1->data = strtol(string,&stopstring,10);
    p2 = p1;
    while (('q' != *stopstring)||('Q' != *stopstring))
    {
        n = n + 1;
        if (1 ==n)
            Header = p1;
        else
            p2->next = p1;
        p2 = p1;
        p1 = (struct node *)malloc(sizeof(struct node));
        printf("Please input an integer number:\n");
        scanf("%s",string);
      
     }
    p2->next = NULL;
    return (Header);
}

struct node *BubbleSort(struct node *Header)
{
    struct node *p1,*p2;
    long int temp;
    if (NULL == Header)
    {
        printf("The linked list is Null!");
        return Header;
    }
    for (p1 = Header; NULL != p1->next;p1++)
    {
        for (p2 = p1->next;NULL != p2;p2++)
        {
            if (p1->data < p2->data)
            {
                temp    = p1->data;
                p1->data = p2->data;
                p2->data = temp;
            }
        }
        Header = p1;
    }
    return (Header);
}
void print(struct node *Header)
{
    struct node *p;
    printf("The sorted number is:\n");
        p = Header;
        if (NULL != Header)
        do
        {
            printf("%ld ",p->data);
            p = p->next;
        }while (NULL != p);
}

求大神指点啊！

字符串不太明白丶观忘中

    p1 = (struct node *)malloc(sizeof(struct node));
    printf("Please input an integer number:\n");
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    scanf("%s",string);  //实际输入当作字符串处理          这里出问题了，说string未初始化，但是不知道是怎么回事
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
#pragma message("Fix const char * bugs")
    gets(string = malloc(sizeof(int)));
    p1->data = strtol(string,&stopstring,10);
    p2 = p1;

error C2440: “=”: 无法从“void *”转换为“char”        35    1    TRY
IntelliSense: 不能将 "void *" 类型的值分配到 "char *" 类型的实体     35    18    TRY

改过之后就有这样的问题，不是很清楚；麻烦大神再帮忙看下。
非常感谢！

如果你从来没学过指针，就绝不会犯这类错误。

调试器是干嘛的啊

char *string;
scanf("%s",string);

你觉得这里scanf()的string指针指向哪里可供输入使用？稍微学了点指针，就把char *当字符串定义用，都不想再啰嗦这种问题了。

#include<stdio.h>
 #include<stdlib.h>
 struct node *LinkListCreate();
 struct node *BubbleSort(struct node *Header);
 void print(struct node *Header);
 struct node
 {
     long int data;
     struct node *next;
 };
 int main()
 {
     struct node *Header;
     Header = LinkListCreate();
     Header = BubbleSort(Header);
     print(Header);
     return 0;
 }
 struct node *LinkListCreate()
 {
     struct node *Header = NULL;
     struct node *p1, *p2;
     int n = 0;
     char *string,*stopstring;
     /*方案1
     char str[10];
     string=str;*/
     /*方案2*/
     string=(char *)malloc(sizeof(char)*10);//10我随便写的
     //指针声明时，指针指向系统随机分配的地址，有可能是操作系统的某条重要指令，所以不能给未知地址赋值，这样是不安全的
     p1 = (struct node *)malloc(sizeof(struct node));
     printf("Please input an integer number:\n");
     scanf("%s",string);  //实际输入当作字符串处理      
     p1->data = strtol(string,&stopstring,10);
     p2 = p1;
     while (('q' != *stopstring)||('Q' != *stopstring))
     {
         n = n + 1;
         if (1 ==n)
             Header = p1;
         else
             p2->next = p1;
         p2 = p1;
         p1 = (struct node *)malloc(sizeof(struct node));
         printf("Please input an integer number:\n");
         scanf("%s",string);
      
      }
     p2->next = NULL;
     return (Header);
 }
 
struct node *BubbleSort(struct node *Header)
 {
     struct node *p1,*p2;
     long int temp;
     if (NULL == Header)
     {
         printf("The linked list is Null!");
         return Header;
     }
     for (p1 = Header; NULL != p1->next;p1++)
     {
         for (p2 = p1->next;NULL != p2;p2++)
         {
             if (p1->data < p2->data)
             {
                 temp    = p1->data;
                 p1->data = p2->data;
                 p2->data = temp;
             }
         }
         Header = p1;
     }
     return (Header);
 }
 void print(struct node *Header)
 {
     struct node *p;
     printf("The sorted number is:\n");
         p = Header;
         if (NULL != Header)
         do
         {
             printf("%ld ",p->data);
             p = p->next;
         }while (NULL != p);
 }
 

谢谢啦！

不用！我也是初学者，一起学习