xiti
/*建立一个带头结点的单向链表,并用随机函数为个结点赋值,函数fun的功能是将数据域为
偶数的值累加起来,并作为函数值返回*/
#include <stdio.h>
#include <stdlib.h>
typedef struct aa
{
int data ;
struct aa *next;
}NODE;
int fun(NODE *h)
{
int sum = 0;
NODE *p;
p=h;
while (p)
{
if (p->data%2==0)
sum=sum+p->data;
p=p->next;
}
return sum;
}
NODE *creatlink(int n)
{
NODE *h,*p,*s;
int i;
h=p=(NODE *)malloc(sizeof(NODE));
for(i=1;i<=n;i++)
{
s=(NODE *)malloc(sizeof(NODE));
s->data=rand()%16; /*产生随机数 范围在0****16之间*/
s->next =p->next; /*连接*/
p->next=s;
p=p->next;
}
p->next=NULL;
return h;
}
outlink(NODE *h,FILE *pf)
{
NODE *p;
p=h->next ;
fprintf(pf,"\n\n The list :\n\n HEAD ");
while(p)
{
fprintf(pf,"->%d",p->data);
p=p->next;}
fprintf(pf,"\n");
}
outresult(int s,FILE *pf)
{
fprintf(pf,"\n The sum of even numbers : %d\n",s);
}
main()
{
NODE *head ;
int even;
head =creatlink(12);
head->data=0;
outlink(head,stdout);
even=fun(head);
printf("\n The result :\n");
outresult(even,stdout);
}