http://www.oschina.net/code/snippet_252667_27314#comments
这个代码有很多错误,估计是从老谭书上抄来但是很多还抄错了:对照老谭的书好好研究下。切记!
p2是p1的跟屁虫!切记
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#include"stdio.h" #include"malloc.h" struct
stu { int
num; //这个是学号 float
score; //这个是分数 struct
stu *next; }; struct
stu*create() { int
n; //这个n这里不大合适 ,最好弄个全局的 struct
stu *head,*p1,*p2; p1=p2=( struct
stu*) malloc ( sizeof ( struct
stu)); scanf ( "%d %f" ,&p1->num,&p1->score); head=NULL; n=0; while (p1->num!=0) { n++; if (n==1)head=p1; else { p2->next=p1; p2=p1; p1=( struct
stu*) malloc ( sizeof ( struct
stu)); scanf ( "%d %f" ,&p1->num,&p1->score); } } p2->next=NULL; return
head; }; //难点在插入操作的实现上(默认从小到大排列的) struct
stu *insert( struct
stu *head, struct
stu *stud) { struct
stu *p0,*p1,*p2; p1=head; p0=stud; while ((p0->num>p1->num)&&(p1->next!=NULL)) { p2=p1; p1=p1->next; } if (p0->num<p1->num) //能在队列中插入(不是尾巴) { if (head==p1)head=p0; //在头部前插入 else //在非头部插入 { p2->next=p0; p0->next=p1; } } else //在尾巴插入 { p1->next=p0; p0->next=NULL; }<br> <span style= "color: rgb(255, 0, 0);" > //这个地方要怎么维护总的num呢 ?</span> return
head; }; //删除操作难度次之 struct
stu *del( struct
stu *head, int
num) { struct
stu *p1,*p2; p1=head; if (head!=NULL) { while ((p1->num<num)&&(p1->next!=NULL)) { p2=p1; p1=p1->next; } if (num==p1->num) //找到节点了 { //这里要考虑删除头节点的情况 p2->next=p1->next; p2=p1;<br> //要考虑删除的节点内存释放<br> //要考虑维护n的数目<br> } else //没有找到节点 { printf ( "NO Result!!!\n" ); } } else printf ( "The linklist is EMPTY\n" ); return
head; }; void
print( struct
stu *head) { struct
stu *p; p=head; while (p) { printf ( "%d %f\n" ,p->num,p->score); p=p->next; } } void
main() { int
n; struct
stu *create(); struct
stu *insert( struct
stu *head, struct
stu *stud); void
print( struct
stu *head); struct
stu *head,*p,*p1; head=create(); p=head; print(p); printf ( "please input :\n" ); scanf ( "%d %f" ,&p1->num,&p1->score); p=insert(head,p1); print(p); printf ( "please input the del num:\n" ); scanf ( "%d" ,&n); p=del(head,n); print(p); } |
原文:http://www.cnblogs.com/jeanschen/p/3542668.html