这是链表的插入程序，但是运行结果显示不出.不知错在哪里了？
#include "stdlib.h"
#include "malloc.h"

struct node
{
    int data;
    struct node *next;
   
};
struct node *insert_list(struct node *head,int value)
{
   
   struct node *n,*p,*q;
   n=(struct node *)malloc(sizeof(struct node));   

     n->data=value;
     p=head;
     if(head==NULL)
     {
       head=n;
       n->next=NULL;
     }
     else
         {
             while((p->next!=NULL)&&(p->data<value))
               {q=p;p=p->next;}
              if(p->data>=value)
                  { if(p==head)
                       {
                           n->next=head;
                           head=n;                              
                       }
                 else
                     {
                          q->next=n;
                          n->next=p;
                     }
                  }
              else
                  {
                    p->next=n;
                    n->next=NULL;                          
                  }
         }        
     return head;   
}

建议仔细检查程序的别的部分。我添加了如下的部分测试下是对的。
void print(struct node *head){
     while(head!=NULL){
         printf("%d\t",head->data);
         head=head->next;
     }
     putchar(10);
}
     
int main(){
    struct node *head=NULL;
    int n=1;
    while(n){
             scanf("%d",&n);
             head=insert_list(head,n);
             printf("%p\n",head);
             print(head);
    }
    return 0;
}

这是我的去不程序，先建立个空链表，然后在插入。不过结果有问题。
  #include "stdlib.h"
#include "malloc.h"

struct node
{
    int data;
    struct node *next;
   
};



struct node *create_list(void)
{
   
  struct node *head;
  clrscr();
  head=(struct node*)malloc(sizeof(struct node));   
    if(head!=NULL)
    {
      printf("successful");
      head->next=NULL;   
    }
    else
         printf("fail");

     printf("\nInput any key to return menu...");
   getch();
   menu();
        return head;
}

struct node *insert_list(struct node *head,int value)
{
   
   struct node *n,*p,*q;
   n=(struct node *)malloc(sizeof(struct node));   

     n->data=value;
     p=head;
     if(head==NULL)
     {
       head=n;
       n->next=NULL;
     }
     else
         {
             while((p->next!=NULL)&&(p->data<value))
               {q=p;p=p->next;}
              if(p->data>=value)
                  { if(p==head)
                       {
                           n->next=head;
                           head=n;                              
                       }
                 else
                     {
                          q->next=n;
                          n->next=p;
                     }
                  }
              else
                  {
                    p->next=n;
                    n->next=NULL;                          
                  }
         }
     printf("\nInput any key to return menu...");
   getch();
   menu();            
     return head;   
}

void print_list(struct node *head)
{
     
     struct node *p;
     clrscr();
     p=head->next;
   if(head==NULL)
      {
           printf("the list is null!!");     
      }
    else
        {
            printf("print the numbers: ");
            while(p!=NULL)
            {
                printf(" %d",p->data);
                p=p->next;
               
            }
            
        }
   printf("\nInput any key to return menu...");
   getch();
   menu();   
}

 menu()
{
      int ch,num;
       struct node *head;
        clrscr();
        printf("***********************\n");
        printf("1.create\n");
        printf("2.insert\n");      
        printf("3.print\n");
        printf("4.exit\n");
        printf("***********************\n");
      printf("Input your choose(1-4):");
      scanf("%d",&ch);
     while (ch<1 || ch>4)
    { printf("Your choose is error! Input again!\n");
       printf("Input your choose(1-4):");
       scanf("%d",&ch);
     }
      switch(ch)
      {
           case 1: head=create_list();break;
           case 2:
                   {
                      clrscr();
                     printf("please input the data:");
                     scanf("%d",&num);

                     head=insert_list(head,num);

                     break;
                    }
           case 3: print_list(head);break;
           case 4: exit(0);break;
      }
    getch();

}

int main(void)
{
   
  menu();
 return 0;   
}

没有错啊
我看看。。。。

恩 好的。谢谢了

貌似是TC下的程序。
就不运行了，简单看下，问题如下
1，没有stdio.h的头文件。以后注意加上
2，输出的函数有错。总是丛第二个开始打印的，注意看下~

程序中有stdio.h的头文件,我加过了。输出函数应该没错，我把插入函数去掉，直接在创建链表中输入数据，然后在打印。

p=head->next
上来就是这个，第一项呢？

把那个输出换成p=head；还是有问题。

大家帮忙解答一下了 ，这个问题想了好几天了。