C语言——有序链表

版权声明：未经允许，不得转载 https://blog.csdn.net/frozennet/article/details/88685883

题目：建立一个带有头结点的单项链表，链表中的各个结点按照结点数据域中的数据递增有序连接。函数fun功能：把形参x的值放入一个新结点并插入到链表中，插入后各个结点数据域仍保持递增有序。

代码：

#include<stdio.h>
#include<stdlib.h>

#define N 8
typedef struct list
{
	int data;
	struct list *next;
 }SLIST;
 
 void fun(SLIST *h,int x)
 {
 	SLIST *p,*q,*s;
 	s=(SLIST *)malloc(sizeof(SLIST));
 	s->data=x;
 	q=h;
 	p=h->next;
 	while(p!=NULL&&x>p->data)
 	{
 		q=p;
 		p=p->next;
	 }
	 s->next=p;
	 q->next=s;
  } 
  
  SLIST *creatlist(int *a)
  {
  	SLIST *h,*p,*q;
  	int i;
  	h=p=(SLIST*)malloc(sizeof(SLIST));
  	for(i=0;i<N;i++)
  	{
  		q=(SLIST*)malloc(sizeof(SLIST));
  		q->data=a[i];
  		
  		p->next=q;
  		p=q; 		
	}
	p->next=0;
	return h;	
  }
  
  void outlist(SLIST *h)
  {
  	SLIST *p;
  	p=h->next;
  	if(p==NULL)
  	printf("\nThe list is NULL\n");
  	else
  	{
  		printf("\nHead");
  		do{
  			printf("->%d",p->data);
  			p=p->next;
		  }while(p!=NULL);
		  printf("->End\n");
	  }
  }
  
  int main()
  {
  	SLIST *head;
  	int x;
  	int Inta[N]={12,15,18,19,22,25,29};
  	head=creatlist(Inta);
  	printf("\nThe list before inserting:\n");
  	outlist(head);
  	printf("\nEnter a number: ");
  	scanf("%d",&x);
  	fun(head,x);
  	printf("\nThe list after inserting:\n");
  	outlist(head); 
  }

运行结果：