#include<stdio.h>
#include<malloc.h>
#include<stdlib.h>
#include<string.h>
#define LEN sizeof(struct student)
struct student
{
int num;
float score;
float score1;
float score2;
float score3;
char name[20];
struct student *next;
};
int n;
struct student *creat(struct student *head)
{
struct student *p1=(struct student*)malloc(LEN);
printf("请输入学号:\n");
scanf("%d",&p1->num);
printf("请输入姓名:\n");
scanf("%s",&p1->name);
printf("\n请输入高数成绩:\n");
scanf("%f",&p1->score);
printf("\n请输入C语言成绩:\n");
scanf("%f",&p1->score1);
printf("\n请输入英语成绩:\n");
scanf("%f",&p1->score2);
p1->score3=p1->score1+p1->score+p1->score2;
int b=0;struct student *p2;
struct student *p3=(struct student*)malloc(LEN);;
p2=p3=head;
int a,c;
while(p3)
{
p3=p3->next;
}
if(head==NULL) p2=head=p1;
else
{
while(p2->next)
{
p2=p2->next;
}
}
p2->next=p1;
p1->next=NULL;
return head;
}
struct student *change(struct student *head)
{
struct student *p1,*p2;
p2=(struct student *)malloc(LEN);
printf("请输入学号:\n");
scanf("%d",&p2->num);
printf("请输入姓名:\n");
scanf("%s",&p2->name);
printf("\n请输入高数成绩:\n");
scanf("%f",&p2->score);
printf("\n请输入C语言成绩:\n");
scanf("%f",&p2->score1);
printf("\n请输入英语成绩:\n");
scanf("%f",&p2->score2);
p2->score3=(p2->score1+p2->score+p2->score2)/3;
p1=head;
while(p1->num!=p2->num&&p1->num!=NULL)
{
p2=p1;
p1=p1->next;
}
if(p2->num==p1->num)
{
if(p1==head) head=p1->next;
else p2->next=p1->next;
}
struct student *p3;
p3=head;
int a,c;
if(head==NULL) head=p2;
else
{
while(p3)
{
p3=p3->next;
}
p3->next=p2;
}
p2->next=NULL;
printf("修改成功");
return head;
}
void print(struct student *head)
{
struct student *p;
p=head;
if(head)
{
while(p)
{
printf("学号\t姓名\t高数\tC语言\t英语\t总分\n",p->num,p->name,p->score);
printf("%d %s %.2f %.2f %.2f %.2f\n",p->num,p->name,p->score,p->score1,p->score2,p->score3);
p=p->next;
}
}
}
struct student *del(struct student *head)
{
struct student *p1,*p2;
int num;
printf("\n请输入需要删除的学号:");
scanf("%d",&num);
if(head==NULL)
{
printf("\nTfis list is null!\n");
goto end;
}
p1=head;
while(p1->num!=num&&p1->num!=NULL)
{
p2=p1;
p1=p1->next;
}
if(num==p1->num)
{
if(p1==head) head=p1->next;
else p2->next=p1->next;
printf("删除成功！！");
n=n-1;
}
else printf("%d not been found!\n",num);
return head;
end:return head;
}
void find(struct student *head)
{
int c=0,num;
struct student *p1,*p2;
printf("\n请输入与要查找的学号:");
scanf("%d",&num);
if(head==NULL) printf("\nTfis list is null!\n");
else
{
p1=head;
while(p1)
{
if(p1->num!=num)
{
p1=p1->next;
}
else
{
printf("学号\t姓名\t高数\tC语言\t英语\t总分\n");
printf("%d %s %.2f %.2f %.2f %.2f\n",p1->num,p1->name,p1->score,p1->score1,p1->score2,p1->score3);
c=1;break;
}
}
if(c==0)
{
system("color 4");
printf("没有你所要查找的学生请重新选择！！！");
}
}
}
void find1(struct student *head)
{
int c=0,num;
char name[20];
struct student *p1,*p2;
printf("\n请输入与要查找的姓名:");
scanf("%s",&name);
if(head==NULL) printf("\nTfis list is null!\n");
else
{
p1=head;
while(p1)
{
if(strcmp(p1->name,name)!=0)
{
p1=p1->next;
}
else
{
printf("学号\t姓名\t高数\tC语言\t英语\t总分\n");
printf("%d %s %.2f %.2f %.2f %.2f\n",p1->num,p1->name,p1->score,p1->score1,p1->score2,p1->score3);
c=1;break;
}
}
if(c==0)
{
system("color 4");
printf("没有你所要查找的学生请重新选择！！！");
}
}
}
struct student *sort(struct student *head)
{
student *p1,*p2,*p3;
int n;
p1=head;
n=1;
while(p1->next)
{ n++; p1=p1->next; }
int i;
p1=head;
for(i=1;i<n;i++)
{
p1=head;
if (p1->score3<p1->next->score3)
{
p2=p1->next;
p1->next=p1->next->next;
p2->next=p1;
head=p2;
}
p1=head;
while(p1->next->next)
{
p2=p1;
p1=p1->next;
if(p1->score3<p1->next->score3)
{
p2->next=p1->next;
p1->next=p1->next->next;
p2->next->next=p1;
p1=p2->next;
}
}
}
print(head);
return head;
}
void count(struct student *head)
{
student *p1,*p2,*p3;
int a=0,b=0,c=0,d=0;
p1=head;
while(p1->next)
{
if(p1->score3>=270) a++;
if(p1->score3>=240&&p1->score3<=270) b++;
if(p1->score3>=180&&p1->score3<=240) c++;
if(p1->score3<180) d++;
p1=p1->next;
}
printf("优，良，中，差的人分别有：%d %d %d %d",a,b,c,d) ;
}
void save(struct student *head)
{
struct student *p;
p=head;
FILE*fp = fopen("101.txt","w+");
if(fp!=NULL)
{
while(p!=NULL)
{
fprintf(fp,"%d\t%s\t%f\t%f\t%f\t%f\n",p->num,p->name,p->score,p->score1,p->score2,p->score3);
p=p->next;
printf("保存成功！\n");
}
}
fclose(fp);
}
int choose()
{
int a,d,num2,score2,n;
struct student *stu_2,*head;
head=NULL;
while(true)
{
system("color 6");
printf("请选择你所需要的操作\n");
printf("\t\t\t\t\t\t****************************\n");
printf("\t\t\t\t\t\t*\t1.创建数据 *\n");
printf("\t\t\t\t\t\t*\t2.学号查找 *\n");
printf("\t\t\t\t\t\t*\t3.姓名查找 *\n");
printf("\t\t\t\t\t\t*\t4.排序 *\n");
printf("\t\t\t\t\t\t*\t5.统计 *\n");
printf("\t\t\t\t\t\t*\t6.存入文件 *\n");
printf("\t\t\t\t\t\t*\t7.输出数据 *\n");
printf("\t\t\t\t\t\t*\t8.删除 *\n");
printf("\t\t\t\t\t\t*\t9.修改 *\n");
printf("\t\t\t\t\t\t*\t10.退出程序 *\n");
printf("\t\t\t\t\t\t****************************\n");
scanf("%d",&a);
fflush(stdin);
switch(a)
{
case 3:find1(head);break;
case 2:find(head);break;
case 4:head=sort(head);break;
case 5:count(head);break;
case 6:save(head);break;
case 7:print(head);break;
case 1:head=creat(head);break;
case 8:head=del(head);break;
case 9:head=change(head);break;
case 10:exit(0);break;
}
}
}
int main()
{
choose();
}
|