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p8ohe5sby 1 week ago
parent 7ada371edf
commit 1ba1070179
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学生成绩管理系统.cpp
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#define len sizeof(struct grade)
struct grade
{
char id[10];
char clas[10];
char name[20];
float score1;
float score2;
float score3;
float score;
struct grade *next;
struct grade *prev;
};
void print()
{
int i;
for(i=1;i<=30;i++)
{
printf(" ");
}
};
void menu(struct grade *head,struct grade *tail)
{
void student1(struct grade *head);
void delet(struct grade *head,struct grade *tail);
void printgrade(struct grade *head,struct grade *tail);
void selecty(struct grade *head,struct grade *tail);
void arra(struct grade *head,struct grade *tail);
char c;
print();
printf("1.input\n");
print();
printf("2.delete\n");
print();
printf("3.select\n");
print();
printf("4.order\n");
print();
printf("5.output\n");
print();
printf("6.quit\n");
printf("please input your option\n");
scanf("%s",&c);
switch(c)
{
case'1':student1(head);break;
case'2':delet(head,tail);break;
case'3':selecty(head,tail);break;
case'4':arra(head,tail);break;
case'5':printgrade(head,tail);break;
case'6':break;
default:printf("Wrong input");
return;
}
}
void printgrade1(struct grade *p)
{
printf("%s,",p->id);
printf("%s,",p->clas);
printf("%s,",p->name);
printf("%4.1f,",p->score1);
printf("%4.1f,",p->score2);
printf("%4.1f,",p->score3);
printf("%5.1f",p->score);
printf("\n");
}
void printgrade(struct grade *head,struct grade *tail)
{
if(head==NULL)
{
printf("error!\n");
menu(head,tail);
return;
}
else
{
struct grade *p=head;
while(p->next!=NULL)
{
printgrade1(p);
p=p->next;
}
printgrade1(tail);
printf("\n");
menu(head,tail);
return;
}
}
void judge(struct grade *head,struct grade *tail,struct grade *next,struct grade *prev,struct grade *pres)
{
bool judgechar(char str1[],char str2[]);
void student2(struct grade *head,struct grade *tail,struct grade *next,struct grade *prev,struct grade *pres);
char s[3],s1[10]="yes";
printf("countinue?\n");
scanf("%s",s);
if(judgechar(s,s1))
{student2(head,tail,next,prev,pres);
return;}
else
{menu(head,tail);
return;}
}
void fill(struct grade *p)
{
printf("id: ");
scanf("%s",(*p).id);
printf("class: ");
scanf("%s",(*p).clas);
printf("name: ");
scanf("%s",(*p).name);
printf("score1: ");
scanf("%f",&(*p).score1);
printf("score2: ");
scanf("%f",&(*p).score2);
printf("score3: ");
scanf("%f",&(*p).score3);
p->score=p->score1+p->score2+p->score3;
}
void student1(struct grade *head)
{
void student2(struct grade *head,struct grade *tail,struct grade *next,struct grade *prev,struct grade *pres);
struct grade *p,*tail;
p=(struct grade *)malloc(len);
fill(p);
p->next=NULL;
p->prev=NULL;
head=p;
tail=p;
judge(head,tail,(*p).next,(*p).prev,p);
return;
}
void student2(struct grade *head,struct grade *tail,struct grade *next,struct grade *prev,struct grade *pres)
{
struct grade *p,*q=pres;
p=(struct grade *)malloc(len);
fill(p);
q->next=p;
p->next=NULL;
p->prev=q;
tail=p;
judge(head,tail,next,prev,p);
return;
}
bool judgechar(char str1[],char str2[])
{
int Len=strlen(str2),i,m=1;
for(i=0;i<=Len-1;i++)
{
if(str1[i]!=str2[i])
{
m=0;
break;
}
}
if(m==1)
return true;
else
return false;
}
void delet(struct grade *head,struct grade *tail)
{
if(head==NULL||head->next==NULL)
{
printf("error!\n");
menu(head,tail);
return;
}
else
{
char str[256],str1[10],str2[10]="yes";
struct grade *p=head->next;
printf("The student you want to delete: ");
scanf("%s",str);
if(judgechar(head->id,str)||judgechar(head->name,str))
{
struct grade *p1;
p1=head->next;
free(head);
head=p1;
}
else
{
if(judgechar(tail->id,str)||judgechar(tail->name,str))
{
struct grade *p1;
(*(tail->prev)).next=NULL;
p1=tail->prev;
free(tail);
tail=p1;
}
else
{
while(p->next!=NULL)
{
if(judgechar(p->id,str)||judgechar(p->name,str))
{
(*(p->prev)).next=p->next;
(*(p->next)).prev=p->prev;
free(p);
break;
}
else
p=p->next;
}
}
}
printf("Do you want to delete anymore?\n");
scanf("%s",str1);
if(judgechar(str1,str2))
{
if(head->next==NULL)
{
printf("error!\n");
menu(head,tail);
return;
}
else
{
delet(head,tail);
return;
}
}
else
{
printgrade(head,tail);
return;
}
}
}
void swap1(char str1[],char str2[])
{
char str[100];
strcpy(str,str2);
strcpy(str2,str1);
strcpy(str1,str);
}
void swap(struct grade *p,struct grade *q)
{
int temp;
swap1(p->id,q->id);
swap1(p->name,q->name);
swap1(p->clas,q->clas);
temp=q->score1;
q->score1=p->score1;
p->score1=temp;
temp=q->score2;
q->score2=p->score2;
p->score2=temp;
temp=q->score3;
q->score3=p->score3;
p->score3=temp;
temp=q->score;
q->score=p->score;
p->score=temp;
}
void arra(struct grade *head,struct grade *tail)
{
struct grade *p,*q;
if(head==NULL)
{
printf("error!\n");
menu(head,tail);
return;
}
else
{
for(p=head;p->next!=NULL;p=p->next)
{
if(p->next==tail)
{
if(tail->score>p->score)
swap(p,tail);
}
else
{
for(q=p->next;q->next!=NULL;q=q->next)
{
if(q->score>p->score)
swap(p,q);
}
if(tail->score>p->score)
swap(p,tail);
}
}
printgrade(head,tail);
return;
}
}
void selecty(struct grade *head,struct grade *tail)
{
struct grade *p;
char str[100];
int m=0;
if(head==NULL)
{
printf("error!\n");
menu(head,tail);
return;
}
else
{
printf("Who do you want to inquire: ");
scanf("%s",str);
for(p=head;p->next!=NULL;p=p->next)
{
if(judgechar(p->id,str)||judgechar(p->name,str))
{
printgrade1(p);
m++;
menu(head,tail);
}
}
if(judgechar(tail->id,str)||judgechar(tail->name,str))
{
printgrade1(tail);
m++;
menu(head,tail);
}
if(m==0)
printf("there is no eligible student\n");
return;
}
}
int main()
{ struct grade *head=NULL,*tail;
menu(head,tail);
return 0;
}
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