学生成绩信息管理系统源代码
#include
#include
#include
#include
#define NULL 0
#define LEN sizeof(struct student)
#include
struct student//定义结构体
{int number;
char name[10];
float score;
float yuwen;
float yingyu;
float shuxue;
float sum;
float ave;
struct student *next;
};
typedef struct student score;
int n,k;
score *creat(void)//创建链表
{
score*head;
score *p1,*p2,*p3,*max;
float sum=0,ave=0;
int i,j;
float fen;
char t[10];
n=0;
p1=p2=p3=(score *)malloc(LEN);head=p3;
printf("请输入学生信息，输0退出!\n");
repeat1: printf("请输入学生学号：");
scanf("%d",&p1->number);
while(p1->number<0)
{getchar();
printf("输入错误，请重新输入学生学号:");
scanf("%d",&p1->number);}
if(p1->number==0)
goto end;
else
{
p3=head;
if(n>0)
{for(i=0;i
p3=p3->next;
else
{printf("学号重复,请重输!\n");
goto repeat1;
}
}
}
}
printf("请输入学生姓名：");
scanf("%s",&p1->name);
printf("请输入语文成绩(0~100)：");
scanf("%f",&p1->yuwen);
while(p1->yuwen<0||p1->yuwen>100)
{getchar();
printf("输入错误，请重新输入语文成绩");
scanf("%f",&p1->yuwen);}
printf("请输入英语成绩(0~100)：");
scanf("%f",&p1->yingyu);
while(p1->yingyu<0||p1->yingyu>100)
{getchar();
printf("输入错误，请重新输入英语成绩");
scanf("%f",&p1->yingyu);}
printf("请输入数学成绩(0~100)：");
scanf("%f",&p1->shuxue);
while(p1->shuxue<0||p1->shuxue>100)
{getchar();
printf("输入错误，请重新输入数学成绩");
scanf("%f",&p1->shuxue);}
sum=p1->yuwen+p1->yingyu+p1->shuxue;
ave=sum/3;
head=NULL;
while(p1->number!=0)
{
n=n+1;
if(n==1)
head=p1;
else
p2->next=p1;
p2=p1;
p1=(score *)malloc(LEN);
printf("请输入学生信息，输0退出!\n");
repeat2:printf("请输入学生学号：");
scanf("%d",&p1->number);
while(p1->number<0)
{getchar();
printf("输入错误,请重新输入学生学号:");
scanf("%d",&p1->number);}
if(p1->number==0)
goto end;
else
{
p3=head;
if(n>0)
{for(i=0;i
p3=p3->next;
else
{printf("学号重复,请重输!\n");
goto repeat2;
}
}
}
}
printf("请输入学生姓名：");
scanf("%s",&p1->name);
printf("请输入语文成绩(0~100)：");
scanf("%f",&p1->yuwen);
while(p1->yuwen<0||p1->yuwen>100)
{getchar();
printf("输入错误，请重新输入语文成绩");
scanf("%f",&p1->yuwen);}
printf("请输入英语成绩(0~100)：");
scanf("%f",&p1->yingyu);
while(p1->yingyu<0||p1->yi
ngyu>100)
{getchar();
printf("输入错误，请重新输入英语成绩");
scanf("%f",&p1->yingyu);}
printf("请输入数学成绩(0~100)：");
scanf("%f",&p1->shuxue);
while(p1->shuxue<0||p1->shuxue>100)
{getchar();
printf("输入错误，请重新输入数学成绩");
scanf("%f",&p1->shuxue);
}
}
end: p1=head;
p3=p1;
for(i=1;i
for(j=i+1;j<=n;j++)
{
max=p1;
p1=p1->next;
if(max->number>p1->number)
{
k=max->number;
max->number=p1->number;
p1->number=k;
strcpy(t,max->name);
strcpy(max->name,p1->name);
strcpy(p1->name,t);
fen=max->yuwen;
max->yuwen=p1->yuwen;
p1->yuwen=fen;
fen=max->yingyu;
max->yingyu=p1->yingyu;
p1->yingyu=fen;
fen=max->shuxue;
max->shuxue=p1->shuxue;
p1->shuxue=fen;
}
}
max=head;p1=head;
}
p2->next=NULL;
printf("共存在%d个学生信息!\n",n);
return(head);
}
void print(struct student *head)//输出函数
{struct student *p1;
float sum,ave;
printf("\nNow,These %d records are:\n",n); p1=head;
if(head!=NULL)
printf("------------------------------------------------------\n");
printf("|学号\t|姓名\t|语文\t|英语\t|数学\t|总分\t|平均分\t|\n");
printf("-------------------------------------------------------\n");
do
{sum=p1->yuwen+p1->yingyu+p1->shuxue;
ave=sum/3;
printf("|%d\t|%s\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|\n",p1->number,p1->name,p1->yuwen,p1->yingyu,p1->shuxue,sum,ave);
p1=p1->next;
}while(p1!=NULL);
}
score *del(score *head)//删除函数
{
score *p1,*p2;
int number;
printf("输入要删除的学生的学号(输入0则退出):");
scanf("%d",&number);
getchar();
while(number!=0)
{
if(head==NULL)
{
printf("\n没有任何学生信息!\n");
return(head);
}
p1=head;
while(number!=p1->number&&p1->next!=NULL)
{
p2=p1;p1=p1->next;
}
if(number==p1->number)
{
if(p1==head)
head=p1->next;
else
p2->next=p1->next;
printf("删除:%d\n",number);n=n-1;
}
else
printf("%d不存在此学生!\n",number);
printf("输入要删除的学生的学号:");
scanf("%d",&number);
getchar();
}
#ifdef DEBUG
printf("已经退出了!\n");
#endif
printf("现在的学生数为:%d个!\n",n);
return(head);
}
struct student *insert(struct student *head, struct student *stud)//插入函数
{struct student *p0,*p1,*p2;
p1=head;
p0=stud;
if(head==NULL)//头指针为空
{head=p0; p0->next=NULL;}
else
{while((p0->number>p1->number) && (p1->next!=NULL))
{p2=p1;
p1=p1->next;}
if(p0->number<=p1->number)
{if(head==p1) head=p0;
else p2->next=p0;
p0->next=p1;}
else
{p1->next=p0; p0->next=NULL;}}
n=n+1;
return(head);
}
score *load(score *head)//读取文件信息
{ score *p1,*p2;
float sum,ave;
int m=0;
char filepn[10];
FILE *fp;
printf("请输入文件路径及文件名:");
scanf("%s",filepn);
if((fp=fopen(filepn,"r+"))==NULL)
{
printf("不能打开文件!\n");
return 0;
}
fscanf(fp,"----------------------------------------------------------\n");
fscanf(fp,"|学号\t|姓名\t|语文\t|英语\t|数学\t|总分\t|平均分\t|\n");
fscanf(fp,"----------------------------------------------------------\n");
printf("------------------------------------------------------------\n");
printf("|学号\t|姓名\t|语文\t|英语\t|数学\t|总分\t|平均分\t|\n");
printf("------------------------------------------------------------\n");
m=m+1;
if(m==1)
{
p1=(score *)malloc(LEN);
sum=p1->yuwen+p1->yingyu+p1->shuxue;
ave=sum/3;
fscanf(fp,"%d%s%f%f%f%f%f",&p1->number,p1->name,&p1->yuwen,&p1->yingyu,&p1->shuxue,sum,ave);
printf("|%d\t|%s\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|\n",p1->number,p1->name,p1->yuwen,p1->yingyu,p1->shuxue,sum,ave);
head=NULL;
do
{
n=n+1;
if(n==1) head=p1;
else p2->next=p1;
p2=p1;
p1=(score *)malloc(LEN);
fscanf(fp,"%d%s%f%f%f%f%f\n",&p1->number,p1->name,&p1->yuwen,&p1->yingyu,&p1->shuxue,sum,ave);
printf("|%d\t|%s\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|\n",p1->number,p1->name,p1->yuwen,p1->yingyu,p1->shuxue,sum,ave);
}while(!feof(fp));
p2->next=p1;
p1->next=NULL;
n=n+1;
}printf("---------------------------------------------------------\n");
fclose(fp);
return (head);
}
score *add(score *head,score *stu)//增加信息
{
score *p0,*p1,*p2,*p3,*max;
int i,j;
float fen;
char t[10];
p3=stu=(score *)malloc(LEN);
printf("\n输入要增加的学生的资料!");
repeat4: printf("请输入学生学号(学号应大于0)：");
scanf("%d",&stu->number);
while(stu->number<0)
{getchar();
printf("输入错误，请重新输入学生学号:");
scanf("%d",&stu->number);}
if(stu->number==0)
goto end2;
else
{
p3=head;
if(n>0)
{for(i=0;i
p3=p3->next;
else
{printf("学号重复,请重输!\n");
goto repeat4;
}
}
}
}
printf("输入学生姓名：");
scanf("%s",stu->name);
printf("请输入语文成绩(0~100)：");
scanf("%f",&stu->yuwen);
while(stu->yuwen<0||stu->yuwen>100)
{getchar();
printf("输入错误，请重新输入语文成绩");
scanf("%f",&stu->yuwen);}
printf("请输入英语成绩(0~100)：");
scanf("%f",&stu->yingyu);
while(stu->yingyu<0||stu->yingyu>100)
{getchar();
printf("输入错误，请重新输入英语成绩");
scanf("%f",&stu->yingyu);}
printf("请输入数学成绩(0~100)：");
scanf("%f",&stu->shuxue);
while(stu->shuxue<0||stu->shuxue>100)
{getchar();
printf("输入错误，请重新输入数学成绩");
scanf("%f",&stu->shuxue);}
p1=head;
p0=stu;
if(head==NULL)
{head=p0;p0->next=NULL;}
else
{
if(p1->next==NULL)
{
p1->next=p0;
p0->next=NULL;
}
else
{
while(p1->next!=NULL)
{
p2=p1;p1=p1->next;
}
p1->next=p0;
p0->next=NULL;
}
}
n=n+1;
p1=head;
p0=stu;
for(i=1;i
for(j=i+1;j<=n;j++)
{
max=p1;
p1=p1->next;
if(max->number>p1->number)
{
k=max->number;
max->number=p1->number;
p1->number=k;
strcpy(t,max->name);
strcpy(max->name,p1->name);
strcpy(p1->name,t);
fen=max->yuwen;
max->yuwen=p1->yuwen;
p1->yuwen=fen;
fen=max->yingyu;
max->yingyu=p1->yingyu;
p1->yingyu=fen;
fen=max->shuxue;
max->shuxue=p1->shuxue;
p1->shuxue=fen;
}
}
max=head;p1=head;
} end2:
printf("现在的学生数为:%d个!\n",n);
return(head);
}
save(score *p1) //保存函数
{
FILE *fp;
float sum,ave;
char filepn[20];
printf("请输入文件路径及文件名:");
scanf("%s",filepn);
if((fp=fopen(filepn,"w+"))==NULL)
{
printf("不能打开文件!\n");
return 0;
}
fprintf(fp,"-----------------------------------------\n");
fprintf(fp,"|学号\t|姓名\t|语文\t|英语\t|数学\t|总分\t|平均分\t|\n");
fprintf(fp,"-----------------------------------------\n");
while(p1!=NULL)
{
sum=p1->yuwen+p1->yingyu+p1->shuxue;
ave=sum/3;
fprintf(fp,"%d\t%s\t%.1f\t%.1f\t%.1f\t\n",p1->number,p1->name,p1->yuwen,p1->yingyu,p1->shuxue,sum,ave);
p1=p1->next;
}
fclose(fp);
printf("文件已经保存!\n");
return 0;
}
score *search(score *head)//查询函数
{
float sum,ave;
int number;
score *p1,*p2;
printf("输入要查询的学生的学号: ");
scanf("%d",&number);
while(number!=0)
{
if(head==NULL)
{printf("\n没有任何学生资料!\n");return(head);}
printf("-----------------------------------------\n");
printf("|学号\t|姓名\t|语文\t|英语\t|数学\t|总分\t|平均分\t|\n");
printf("-----------------------------------------\n");
p1=head;
while(number!=p1->number&&p1->next!=NULL)
{p2=p1;p1=p1->next;}
sum=p1->yuwen+p1->yingyu+p1->shuxue;
ave=sum/3;
if(number==p1->number)
{printf("|%d\t|%s\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|\n",p1->number,p1->name,p1->yuwen,p1->yingyu,p1->shuxue,sum,ave);
printf("-----------------------------------------\n");}
else
printf("%d不存在此学生!\n",number);
printf("输入要查询的学生的
学号: ");
scanf("%d",&number);
}
printf("已经退出了!\n");
return(head);}
score *statistics(score *head)//统计信息函数
{
float sum1=0,sum2=0,sum3=0,ave1=0,ave2=0,ave3=0,max=0,min;
score *p;
int x,y=0,i=0;
p=head;
printf("1个人总分和平均分\t2单科平均分\t3总分最高分\t4总分最低分\n");
scanf("%d",&x);
getchar();
switch(x)
{
case 1: if(head==NULL)
{printf("\n没有任何学生资料!\n");return(head);}
else
{
printf("---------------------------------------------------------\n");
printf("|学号\t|姓名\t|语文\t|英语\t|数学\t|总分\t|平均分\t|\n");
printf("---------------------------------------------------------\n");
while(p!=NULL)
{
sum1=p->yuwen+p->yingyu+p->shuxue;
ave1=sum1/3;
printf("|%d\t|%s\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|%.1f\t|\n",p->number,p->name,p->yuwen,p->yingyu,p->shuxue,sum1,ave1);
printf("---------------------------------------------------------\n");
p=p->next;}
}
return(head); break;
case 2: if(head==NULL)
{printf("\n没有任何学生资料!\n");return(head);}
while(p!=NULL)
{
sum1=sum1+p->yuwen;
sum2=sum2+p->yingyu;
sum3=sum3+p->shuxue;
y=y+1;
ave1=sum1/y;
ave2=sum2/y;
ave3=sum3/y;
p=p->next;
}
printf("语文平均分是%.1f\n",ave1);
printf("英语平均分是%.1f\n",ave2);
printf("数学平均分是%.1f\n",ave3);
return(head); break;
case 3:
if(head==NULL)
{printf("\n没有任何学生资料!\n");return(head);}
max=p->yuwen+p->yingyu+p->shuxue;
while(i
i=i+1;
sum1=p->yuwen+p->yingyu+p->shuxue;
if(max
p=p->next;
}
printf("总分最高分:%.1f",max);
printf("\n");
return(head); break;
case 4: if(head==NULL)
{printf("\n没有任何学生资料!\n");return(head);}
while(p!=NULL)
{
min=p->yuwen+p->yingyu+p->shuxue;
while(p!=NULL)
{sum2=p->yuwen+p->yingyu+p->shuxue;
if(min>sum2)
min=sum2;
p=p->next;
}
printf("总分最低分:%.1f",min);
printf("\n");
return(head); break;
default :printf("输入错误,请重试!\n");
}
return(head);
}}
score *taxis(score *head)//排序函数
{ score *p,*max;
int i,j,x;
float fen;
char t[10];
if(head==NULL)
{printf("\n没有任何学生资料，请先建立链表!\n");return(head);}
max=p=head;
for(i=0;i<80;i++)
printf("*");
printf("1按学生学号排序\t2按学生姓名排序\t3按语文成绩排序\n");
printf("4按英语成绩排序\t5按数学成绩排序\t\n");
for(i=0;i<80;i++)
printf("*");
printf("请选择操作:");
scanf("%d",&x);
getchar();
switch(x)
{c
ase 1 :
for(i=1;i
for(j=i+1;j<=n;j++)
{
max=p;
p=p->next;
if(max->number>p->number)
{
k=max->number;
max->number=p->number;
p->number=k;
strcpy(t,max->name);
strcpy(max->name,p->name);
strcpy(p->name,t);
fen=max->yuwen;
max->yuwen=p->yuwen;
p->yuwen=fen;
fen=max->yingyu;
max->yingyu=p->yingyu;
p->yingyu=fen;
fen=max->shuxue;
max->shuxue=p->shuxue;
p->shuxue=fen;
}
}
max=head;p=head;
}
print(head);break;
case 2 : for(i=1;i
for(j=i+1;j<=n;j++)
{
max=p;
p=p->next;
if(strcmp(max->name,p->name)>0)
{
strcpy(t,max->name);
strcpy(max->name,p->name);
strcpy(p->name,t);
k=max->number;
max->number=p->number;
p->number=k;
fen=max->yuwen;
max->yuwen=p->yuwen;
p->yuwen=fen;
fen=max->yingyu;
max->yingyu=p->yingyu;
p->yingyu=fen;
fen=max->shuxue;
max->shuxue=p->shuxue;
p->shuxue=fen;
}
}
p=head;
max=head;
}
print(head);
break;
case 3 : for(i=1;i
{max=p;
p=p->next;
if(max->yuwen>p->yuwen)
{
fen=max->yuwen;
max->yuwen=p->yuwen;
p->yuwen=fen;
k=max->number;
max->number=p->number;
p->number=k;
strcpy(t,max->name);
strcpy(max->name,p->name);
strcpy(p->name,t);
fen=max->yingyu;
max->yingyu=p->yingyu;
p->yingyu=fen;
fen=max->shuxue;
max->shuxue=p->shuxue;
p->shuxue=fen;
}
}
p=head;
max=head;
}
print(head);
break;
case 4 : for(i=1;i
{max=p;
p=p->next;
if(max->yingyu>p->yingyu)
{
fen=max->yingyu;
max->yingyu=p->yingyu;
p->yingyu=fen;
k=max->number;
max->number=p->number;
p->number=k;
strcpy(t,max->name);
strcpy(max->name,p->name);
strcpy(p->name,t);
fen=max->yuwen;
max->yuwen=p->yuwen;
p->yuwen=fen;
fen=max->shuxue;
max->shuxue=p->shuxue;
p->shuxue=fen;
}
}
p=head;
max=head;
}
print(head);
break;
case 5 : for(i=1;i
{max=p;
p=p->next;
if(max->shuxue>p->shux
ue)
{
fen=max->shuxue;
max->shuxue=p->shuxue;
p->shuxue=fen;
k=max->number;
max->number=p->number;
p->number=k;
strcpy(t,max->name);
strcpy(max->name,p->name);
strcpy(p->name,t);
fen=max->yuwen;
max->yuwen=p->yuwen;
p->yuwen=fen;
fen=max->yingyu;
max->yingyu=p->yingyu;
p->yingyu=fen;
}
}
p=head;
max=head;
}
print(head);
break;
default :printf("输入错误,请重试! \n");
}
return (0);}
int menu(k)//菜单函数
{
int i;
for(i=0;i<80;i++)
printf("*");
printf("\t\t\t**欢迎进入学生成绩管理系统**\n");
for(i=0;i<80;i++)
printf("*");
printf("**\t1: 输入学生的信息\t**\t6: 显示学生的成绩\t**\n");
printf("**\t2: 从文件读取信息\t**\t7: 统计学生的成绩\t**\n");
printf("**\t3: 查询学生的成绩\t**\t8: 保存输入的信息\t**\n");
printf("**\t4: 删除学生的信息\t**\t9: 对成绩进行排序\t**\n");
printf("**\t5: 插入学生的信息\t**\t0: 退出系统 \t**\n");
for(i=0;i<80;i++)
printf("*");
printf("请从0~9中选择功能操作操作:");
scanf("%d",&k);
getchar();
return (k);}
int main()
{score *head=0,*stu=0;
int t;
while(1)
{
k=menu(k);
system("cls");
switch(k)
{
case 1: head=creat();break;
case 2: head=load(head);break;
case 3: head=search(head);break;
case 4: head=del(head); break;
case 5: head=add(head,stu);break;
case 6: print(head); break;
case 7: statistics(head); break;
case 8: save(head);break;
case 9: taxis(head);break;
case 0: exit(0);
default: printf("输入错误,请重试!\n"); }
}
printf("按任意键继续：");
scanf("%c",&t);
getch();
}