if（i==0）{
p=（Lstu*）malloc（sizeof（Lstu））;
printf（"请输入第%d个人的信息\n",i+1）;
printf（"请输入班级:
"）;scanf（"%d",&p->cla）;
printf（"请输入学号:
"）;scanf（"%ld",&p->num）;
printf（"请输入姓名:
"）;scanf（"%s",p->name）;
printf（"请输入性别:
"）;scanf（"%s",p->sex）;
printf（"请输入语文成绩:
"）;scanf（"%f",&p->chinese）;
printf（"请输入数学成绩:
"）;scanf（"%f",&p->math）;
printf（"请输入英语成绩:
"）;scanf（"%f",&p->english）;
p->sum=p->chinese+p->math+p->english;
p->ave=p->sum/3;
head=p;
if（n==1）{
p->next=NULL;}}
else{
s=（Lstu*）malloc（sizeof（Lstu））;
printf（"请输入第%d个人的信息\n",i+1）;
printf（"请输入班级:
"）;scanf（"%d",&s->cla）;
printf（"请输入学号:
"）;scanf（"%ld",&s->num）;
printf（"请输入姓名:
"）;scanf（"%s",s->name）;
printf（"请输入性别:
"）;scanf（"%s",s->sex）;
printf（"请输入语文成绩:
"）;scanf（"%f",&s->chinese）;
printf（"请输入数学成绩:
"）;scanf（"%f",&s->math）;
printf（"请输入英语成绩:
"）;scanf（"%f",&s->english）;
s->sum=s->chinese+s->math+s->english;
s->ave=s->sum/3;
p->next=s;p=s;
s->next=NULL;}
}
}
voidList（）{//输出链表内容
Lstu*p;
inti=0;
p=head;
if（p==NULL）{
printf（"Sorry,It'saEmptyList\n"）;}
else{
printf（"\n\n\t------------------------------------------------------------------\n"）;
printf（"\t%-5s%-5s%-10s%-8s%-7s%-10s%-10s%-10s\n","序号","班级","学号","姓名","性别","语文成绩","数学成绩","英语成绩"）;
printf（"\t------------------------------------------------------------------\n"）;
while（p）{i++;p->ID=i;
printf（"\t%-4d%-5d%-7d%-8s%-7s%-10.2f%-10.2f%-10.2f\n",p->ID,p->cla,p->num,p->name,p->sex,p->chinese,p->math,p->english）;
printf（"\t------------------------------------------------------------------\n"）;
p=p->next;
}
}
}
voidlist（）{//输出链表所有内容
Lstu*p;
inti=0;
p=head;
if（p==NULL）{
printf（"Sorry,It'saEmptyList\n"）;}
else{
printf（"\n----------------------------------------------------------------------------------\n"）;
printf（"%-5s%-5s%-7s%-8s%-7s%-10s%-10s%-10s%-8s%-8s\n","序号","班级","学号","姓名","性别","语文成绩","数学成绩",
"英语成绩","总分","平均分"）;
printf（"----------------------------------------------------------------------------------\n"）;
while（p）{i++;p->ID=i;
printf（"%-4d%-6d%-12d%-8s%-7s%-10.2f%-10.2f%-10.2f%-8.2f%-8.2f\n",p->ID,p->cla,p->num,p->name,p->sex,
p->chinese,p->math,p->english,p->sum,p->ave）;
printf（"----------------------------------------------------------------------------------\n"）;
p=p->next;
}
}
}
voidsave（）{//文件保存
FILE*fp;
Lstu*p;
p=head;
if（（fp=fopen（"初始值二进制.txt","wb"））==NULL）
{
printf（"Cannotopenthefile"）;
exit（0）;
}
while（p）{
fwrite（p,sizeof（Lstu）,1,fp）;
p=p->next;}
fclose（fp）;
}
voidsave1（）{//文件保存
FILE*fp;
Lstu*p;
p=head;
if（（fp=fopen（"初始值二进制备用.txt","wb"））==NULL）
{
printf（"Cannotopenthefile"）;
exit（0）;
}
while（p）{
fwrite（p,sizeof（Lstu）,1,fp）;
p=p->next;}
fclose（fp）;
}
voidread（）{//文件读取
FILE*fp;
Lstu*p,*p1;
if（（fp=fopen（"初始值二进制.txt","rb"））==NULL）
{
printf（"Cannotopenthefile\n"）;
exit（0）;
}head=（Lstu*）malloc（sizeof（Lstu））;
p1=head;
while（!
feof（fp））{
p=（Lstu*）malloc（sizeof（Lstu））;
if（fread（p,sizeof（Lstu）,1,fp）==1）
{
p1->next=p;
p1=p1->next;
}
}head=head->next;fclose（fp）;
}
voidread1（）{//文件读取
FILE*fp;
Lstu*p,*p1;
if（（fp=fopen（"初始值二进制备用.txt","rb"））==NULL）
{
printf（"Cannotopenthefile\n"）;
exit（0）;
}head=（Lstu*）malloc（sizeof（Lstu））;
p1=head;
while（!
feof（fp））{
p=（Lstu*）malloc（sizeof（Lstu））;
if（fread（p,sizeof（Lstu）,1,fp）==1）
{
p1->next=p;
p1=p1->next;
}
}head=head->next;fclose（fp）;
}
voidSAVE（）{//保存到可浏览文件
FILE*fp;
Lstu*p;inti=0;
p=head;
if（（fp=fopen（"初始值可浏览文件.txt","w+"））==NULL）
{
printf（"Cannotopenthefile"）;
exit（0）;
}
fprintf（fp,"\n\n\t------------------------------------------------------------------\n"）;
fprintf（fp,"\t%-5s%-5s%-10s%-8s%-7s%-10s%-10s%-10s\n","序号","班级","学号","姓名","性别","语文成绩","数学成绩","英语成绩"）;
fprintf（fp,"\t------------------------------------------------------------------\n\n"）;
while（p）{
i++;p->ID=i;
fprintf（fp,"\t%-4d%-5d%-7d%-8s%-7s%-10.2f%-10.2f%-10.2f\n",p->ID,p->cla,p->num,p->name,
p->sex,p->chinese,p->math,p->english）;
fprintf（fp,"\t------------------------------------------------------------------\n"）;
p=p->next;
}
fclose（fp）;
}
voidSAVE1（）{//保存到可浏览文件
FILE*fp;charfilename[20];
Lstu*p;inti=0;
p=head;
printf（"请输入保存到可浏览文件的文件名:
"）;
scanf（"%s",filename）;
if（（fp=fopen（filename,"w+"））==NULL）
{
printf（"Cannotopenthefile"）;
exit（0）;
}
fprintf（fp,"\n----------------------------------------------------------------------------------\n"）;
fprintf（fp,"%-5s%-5s%-7s%-8s%-7s%-10s%-10s%-10s%-8s%-8s\n","序号","班级","学号","姓名","性别","语文成绩","数学成绩",
"英语成绩","总分","平均分"）;
fprintf（fp,"----------------------------------------------------------------------------------\n"）;
while（p）{
i++;p->ID=i;
fprintf（fp,"%-4d%-5d%-7d%-8s%-7s%-10.2f%-10.2f%-10.2f%-8.2f%-8.2f\n",p->ID,p->cla,p->num,p->name,p->sex,
p->chinese,p->math,p->english,p->sum,p->ave）;
fprintf（fp,"-------------------------------------------------------------------------------\n"）;
p=p->next;
}
fclose（fp）;
}
voidsort_data_copy（Lstu*p,Lstu*s）{//交换排序时的值
intcla1;
cla1=p->cla;p->cla=s->cla;s->cla=cla1;
longnum1;
num1=p->num;p->num=s->num;s->num=num1;
charname1[20];
strcpy（name1,p->name）;strcpy（p->name,s->name）;strcpy（s->name,name1）;
charsex1[20];
strcpy（sex1,p->sex）;strcpy（p->sex,s->sex）;strcpy（s->sex,sex1）;
floatchinese1;
chinese1=p->chinese;p->chinese=s->chinese;s->chinese=chinese1;
floatmath1;
math1=p->math;p->math=s->math;s->math=math1;
floatenglish1;
english1=p->english;p->english=s->english;s->english=english1;
floatsum1;
sum1=p->sum;p->sum=s->sum;s->sum=sum1;
floatave1;
ave1=p->ave;p->ave=s->ave;s->ave=ave1;
}
voidsort（）{//对初始成绩进行排序
Lstu*p,*s;
intn;chara;
read（）;p=head;
if（p==NULL）{
printf（"Sorry,It'saEmptyList\n"）;
printf（"\n按Enter键继续\n"）;a=getch（）;}
else{while
（1）{system（"cls"）;printf（"\n排序前结果为:
\n"）;read（）;list（）;
printf（"\t*=*=*=*=*=*=*=*=*=*=*=按学号排序
（1）\n"）;
printf（"\t*=*=*=*=*=*=*=*=*=*=*=按语文成绩排序
（2）\n"）;
printf（"\t*=*=*=*=*=*=*=*=*=*=*=按数学成绩排序（3）\n"）;
printf（"\t*=*=*=*=*=*=*=*=*=*=*=按英语成绩排序（4）\n"）;
printf（"\t*=*=*=*=*=*=*=*=*=*=*=按平均分排序（5）\
升级会员 