语法没有问题，但是实现不了功能，请大家帮我看看有什么问题，谢谢大家
#include <stdio.h>#include <stdlib.h>
#include <string.h>
#define N 50
#define NAMESIZE 10
typedef struct node
{
long studentID;
char studentname;
int score;
int class;
}node;
struct link
{
node data;
struct link *next;
};
struct link *head=NULL,*head1=NULL,*head2=NULL,*head3=NULL,*head4=NULL; /*定义四个链表的头节点指针和总表的头节点指针*/
/*新建一个链表，并设置头指针*/
struct link *AppendNode(struct link *head)
{
struct link *p=NULL;
node data;
p=(struct link *)malloc(sizeof(struct link));
if(p==NULL)
{
printf("No enough memory to allocate!\n");
exit(0);
}
head=p;
return head;
}
/*插入一个节点，返回插入后链表的头指针*/
struct link *InsertNode(struct link *head,node e)
{
struct link *pr=head,*p=head,*temp=NULL;
p=(struct link *)malloc(sizeof(struct link)); /*p指向带插入节点*/
if(p==NULL)
{
printf("No enough memory!\n");
exit(0);
}
p->next=NULL;
p->data=e;
if(head==NULL)
{
head=p;
}
else
{
while(pr->data.score>e.score&&pr->next!=NULL)
{
temp=pr;
pr=pr->next;
}
if(pr->data.score<=e.score)
{
pr=temp;
p->next=pr->next;
pr->next=p;
}
else /*若在表尾插入新节点*/
{
pr->next=p;
}
}
return head;
}
struct link *Init_List(struct link *head)
{
struct link *q,*p=head;
for(;p->next!=NULL;)
{
q=p;
free(p);
p=q->next;
}
head=NULL;
return head;
}
void Init(void)
{
Init_List(head1);
Init_List(head2);
Init_List(head3);
Init_List(head4);
Init_List(head);
printf("Lists have been initialized!\n");
}
struct link *Merge_List(struct link *head1,struct link *head2,struct link *head)
{
struct link *p,*p1,*p2;
p1=head1;
p2=head2;
head=p=head1;
while(p1&&p2)
{
if(p1->data.score>=p2->data.score)
{
p->next=p1;
p=p1;
p1=p1->next;
}
else
{
p->next=p2;
p=p2;
p2=p2->next;
}
}
p->next=p1?p1:p2;
free(head2);
return head;
}
void Merge(void)
{
struct link *head5,*head6;
Init_List(head);
head5=Merge_List(head1,head2,head5);
head6=Merge_List(head3,head4,head6);
head=Merge_List(head5,head6,head);
}
void SearchID(long ID)
{
Merge();
struct link *p=head;
for(;p!=NULL;p=p->next)
{
if(p->data.studentID==ID)
{
printf("class:\t%d\nstudentname:\t%s\nscore:\t%d\n",p->data.class,p->data.studentname,p->data.score);
break;
}
}
if(p==NULL) printf("Input error!\n");
}
void Searchscore(int score)
{
Merge();
struct link *p=head;
for(;p!=NULL;p=p->next)
{
if(p->data.score==score)
{
printf("class:\t%d\nstudentID:\t%ld\nstudentname:\t%s\nscore:\t%d\n",p->data.class,p->data.studentID,p->data.studentname,p->data.score);
break;
}
}
if(p==NULL) printf("Input error!\n");
}
void output(struct link *head)
{
Merge();
int counter=1;
struct link *p=head;
for(p=p->next;p!=NULL;p=p->next)
{
printf("%d\t%s\t%d\t%d\n",p->data.class,p->data.studentname,p->data.score,counter);
counter++;
}
}
int main()
{
struct link *head=NULL,*head1=NULL,*head2=NULL,*head3=NULL,*head4=NULL;
head=AppendNode(head);
printf("1.Initialize a list.\n2.Insert score.\n3.Merge list.\n4.Search for someone.\n5.Output the result.\n");
int op;
while(scanf("%d",&op)&&op)
{
if(op==1)
{
Init();
break;
}
if(op==2)
{
int score,c;
char n;
node e;
printf("Input the class,studentID,studentname and score.(input -1 as end)\n");
while(scanf("%d",&c)&&c!=-1)
{
e.class=c;
scanf("%ld",&e.studentID);
fgets(e.studentname,sizeof(e.studentname),stdin);
scanf("%d",&e.score);
if(c==1)
{
head1=InsertNode(head1,e);
}
if(c==2)
{
head2=InsertNode(head2,e);
}
if(c==3)
{
head3=InsertNode(head3,e);
}
if(c==4)
{
head4=InsertNode(head4,e);
}
else
{
printf("Input error!.");
}
}
printf("Inserting has been completed!\n");
break;
}
if(op==3)
{
Merge();
break;
}
if(op==4)
{
int ch,score;
long ID;
printf("Press 1 to search through ID and press 2 to search through score:");
scanf("%d",&ch);
switch(ch)
{
case'1':
printf("Input ID:");
scanf("%ld",&ID);
SearchID(ID);break;
case'2':
printf("Input score:");
scanf("%d",score);
Searchscore(score);break;
default:printf("Input error!");
}
break;
}
if(op==5)
{
if(head1!=NULL)printf("Class1 result:\nClass Name Grade Ranking\n");
output(head1);
if(head2!=NULL)printf("Class2 result:\nClass Name Grade Ranking\n");
output(head2);
if(head3!=NULL)printf("Class3 result:\nClass Name Grade Ranking\n");
output(head3);
if(head4!=NULL)printf("Class4 result:\nClass Name Grade Ranking\n");
output(head4);
if(head!=NULL)printf("Totally result:\nClass Name Grade Ranking\n");
output(head);
break;
}
else
{
printf("Input error!\n");
}
}
return 0;
}
老铁，这种太长的代码可以用代码格式发，这样方便别人拷贝和查看
而且请给出你的目的以及运行后的结果差异，这样才能方便别人理清你的思路 int class; 关键字不能做为变量名
“score”: 未引用的局部变量
“n”: 未引用的局部变量
使用了未初始化的局部变量“head5”
使用了未初始化的局部变量“head6”
使用了未初始化的局部变量“score”
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