C语言写的学生成绩管理系统链表.docx
《C语言写的学生成绩管理系统链表.docx》由会员分享,可在线阅读,更多相关《C语言写的学生成绩管理系统链表.docx(10页珍藏版)》请在冰豆网上搜索。
C语言写的学生成绩管理系统链表
C语言写的学生成绩管理系统链表
#include
#include
#include
structstud{
longnum;
charname[20];
floatsx;
floatdx;
floatts;
floatdl;
floatcx;
floatzf;
floatpj;
};
structstudcode{
structstudstudent;
structstudcode*next;
};
voidmenu();
voidinput(structstudcode**);
voidoutput(structstudcode*);
voidbinsearch(structstudcode*);
voidinsert(structstudcode**);
voiddelet(structstudcode**);
voidgood(structstudcode*);
voidfail(structstudcode*);
voidsort(structstudcode*);
voidback();
voidmain()
{
charchoose;
intflag=1;
structstudcode*head;
head=NULL;
printf("请先录入学生成绩信息\n");
printf("输入学生学号姓名高数、英语读写、英语听说、计算机导论和程序设计的成绩\n");
input(&head);
while(flag)
{
system("cls");
menu();
printf("请选择:
");
getchar();
choose=getchar();
switch(choose)
{
case'1':
output(head);
back();
break;
case'2':
binsearch(head);
back();
break;
case'3':
insert(&head);
output(head);
back();
break;
case'4':
delet(&head);
output(head);
back();
break;
case'5':
good(head);
back();
break;
case'6':
fail(head);
back();
break;
case'7':
sort(head);
output(head);
back();
break;
case'0':
flag=0;
printf("\n***TheEnd!
***\n");
printf("\n####感谢使用,欢迎再次登录,拜拜!
####\n");
break;
default:
printf("\nWrongSelection!
(选择错误,请重选)\n");
back();
}
}
}
voidmenu()
{
printf("\n学生成绩统计与分析系统\n");
printf("\n菜单\n\n");
printf("\n1.显示所有学生的信息\n");
printf("\n2.查找某学号的学生信息\n");
printf("\n3.插入某学生的信息\n");
printf("\n4.删除某学号学生的信息\n");
printf("\n5.统计各门课程成绩在90分以上学生所占百分比\n");
printf("\n6.统计各门课程成绩在60分以下学生所占百分比\n");
printf("\n7.按总分降序排序,依高低排出名次\n");
printf("\n0.退出\n\n");
}
voidback()
{
intx;
printf("\n");
do{
printf("按1返回菜单界面:
");
scanf("%d",&x);
}while(x!
=1);
}
voidinput(structstudcode**headp)
{
structstudcode*p;
while
(1)
{
p=(structstudcode*)malloc(sizeof(structstudcode));
scanf("%ld",&p->student.num);
if(p->student.num==0)break;
scanf("%s%f%f%f%f%f",&p->student.name,&p->student.sx,&p->student.dx,&p->student.ts,&p->student.dl,&p->student.cx);
p->student.zf=p->student.sx+p->student.dx+p->student.ts+p->student.dl+p->student.cx;
p->student.pj=p->student.zf/5;
p->next=*headp;
*headp=p;
}
}
voidoutput(structstudcode*head)
{
structstudcode*p;
p=head;
printf("学号\t姓名\t高数\t读写\t听说\t导论\t程序\t总分\t平均分\n");
while(p!
=NULL){
printf("%-ld\t%-4s\t%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\n",p->student.num,p->student.name,p->student.sx,p->student.dx,p->student.ts,p->student.dl,p->student.cx,p->student.zf,p->student.pj);
p=p->next;
}
printf("\n");
}
voidbinsearch(structstudcode*head)
{
structstudcode*p;
intk=1;
longx;
p=head;
printf("请输入需要查找的学生的学号:
");
scanf("%ld",&x);
printf("\n");
while(p!
=NULL){
if(p->student.num==x)
{
printf("该学生信息如下:
\n");
printf("学号\t姓名\t高数\t读写\t听说\t导论\t程序\t总分\t平均分\n");
printf("%-ld\t%-4s\t%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\n",p->student.num,p->student.name,p->student.sx,p->student.dx,p->student.ts,p->student.dl,p->student.cx,p->student.zf,p->student.pj);
k=0;
break;
}
p=p->next;
}
if(k)printf("没有此学生的信息\n");
}
voidinsert(structstudcode**headp)
{
structstudcode*p;
p=(structstudcode*)malloc(sizeof(structstudcode));
printf("请输入你想插入的学生的信息\n");
scanf("%ld%s%f%f%f%f%f",&p->student.num,&p->student.name,&p->student.sx,&p->student.dx,&p->student.ts,&p->student.dl,&p->student.cx);
p->student.zf=p->student.sx+p->student.dx+p->student.ts+p->student.dl+p->student.cx;
p->student.pj=p->student.zf/5;
p->next=*headp;
*headp=p;
printf("*****插入成功*****\n");
}
voiddelet(structstudcode**headp)
{
structstudcode*p,*last;
longx;
p=*headp;
printf("请输入你要删除的学生的学号:
");
scanf("%ld",&x);
while(p->student.num!
=x&&p->next!
=NULL){
last=p;
p=p->next;
}
if(p->student.num==x)
{
if(p==*headp)
*headp=p->next;
else
last->next=p->next;
free(p);
printf("\n*****删除成功*****\n");
}
elseprintf("\n***删除失败,无该学生信息***\n");
}
voidgood(structstudcode*head)
{
structstudcode*p;
intx1,x2,x3,x4,x5,k;
floaty1,y2,y3,y4,y5;
x1=x2=x3=x4=x5=k=0;
p=head;
while(p!
=NULL){
k++;
if(p->student.sx>=90)x1++;
if(p->student.dx>=90)x2++;
if(p->student.ts>=90)x3++;
if(p->student.dl>=90)x4++;
if(p->student.cx>=90)x5++;
p=p->next;
}
y1=(float)x1/k;
y2=(float)x2/k;
y3=(float)x3/k;
y4=(float)x4/k;
y5=(float)x5/k;
printf("高数\t读写\t听说\t导论\t程序\n");
printf("%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\t%-0.2f\n",y1,y2,y3,y4,y5);
}
voidfail(structstudcode*head)
{
structstudcode*p;
intx1,x2,x3,x4,x5,k;
floaty1,y2,y3,y4,y5;
x1=x2=x3=x4=x5=k=0;
p=head;