学生综合测评系统

Posted 2020-07-24 wangyq0517

#include<stdio.h>
#include<stdlib.h>
#define N 100

//----------------------------------------函数声明----------------------------------------
void init();
char welcome();
void InputInfo();
void view();
void xiugai();
void DeleteInfo();
void paiming1(struct student_info student[]);
void paiming2(struct student_info student[]);
void ViewAll();
void clean();
void PaimingView();
void exit();
struct student_info input();
void SortInfo(struct student_info student[]);
void ViewInfo(struct student_info *sp);
void SaveStruct(struct student_info *sp,int size,int n,char filename[20]);
void LoadStruct(struct student_info *sp,int size,int n,char filename[20]);
void SaveInt(int *p,int size,int n,char filename[20]);
void LoadInt(int *p,int size,int n,char filename[20]);
int NumExist(struct student_info student[],int num);

//---------------------------------定义学生信息结构体----------------------------------------

struct student_info
{
int num; //学号
char name[6]; //姓名
char sex[5]; //性别
char adress[20]; //家庭住址
char tel[10]; //电话
int chinese,math,english,huping,pingde,jiaoping,paiming1,paiming2;
//语文 数学 英语 互评 品德 教评
double ave,zhongping;
// 平均 综合

//每个学生的信息为：学号、姓名、性别、家庭住址、联系电话、语文、数学、外语三门单科成绩、
//考试平均成绩、考试名次、同学互评分、品德成绩、任课教师评分、综合测评总分、综合测评名次。
//考试平均成绩、同学互评分、品德成绩、任课教师评分分别占综合测评总分的60%，10%，10%，20%。
};

//---------------------------------定义全局结构体数据----------------------------------------
struct student_info student[N];
int counter,PM;

//----------------------------------------------主函数----------------------------------------
void main()
{
char select;
init(); //调用初始化函数
while(1)
{
select=welcome();
switch(select)
{
case ‘1‘: system("cls"); InputInfo(); break; //选项1:输入学生信息
case ‘2‘: system("cls"); view(); break; //选项2:浏览学生信息
case ‘3‘: system("cls"); xiugai(); break; //选项3:修改学生信息
case ‘4‘: system("cls"); DeleteInfo(); break; //选项4:删除学生信息
case ‘5‘: system("cls"); paiming1(student);paiming2(student);PM=1;getchar();
getchar(); system("cls"); break; //选项5:学生信息排名
case ‘6‘: system("cls"); ViewAll();break; //选项6:浏览全部学生信息
case ‘7‘: system("cls"); clean();break; //选项7:清除所有信息
case ‘8‘: system("cls"); PaimingView();break; //选项8:查询排名
case ‘0‘: system("cls"); exit(); break; //选项9:退出
}
}
}

//----------------------------------------初始化函数----------------------------------------
void init()
{
FILE *fp;
fp=fopen("counter.dat","rb"); //打开计数变量counter文件

if(fp!=NULL) //载入counter
{
fclose(fp);
LoadInt(&counter,sizeof(counter),1,"counter.dat");
}
else
{
fp=fopen("counter.dat","wb"); //若没有counter文件，则创建一个，counter初始为0。
fclose(fp);
counter=0;
}

if(counter!=0) //载入学生数据
LoadStruct(student,sizeof(struct student_info),counter,"student_info.dat");
}

//----------------------------------------欢迎函数----------------------------------------
char welcome()
{
char select;
while(1)
{
system("cls");
printf("\t\t欢迎使用学生信息管理系统 \n");
printf("\n");
printf("1.录入学生信息 \n\n");
printf("2.浏览学生信息 \n\n");
printf("3.修改学生信息 \n\n");
printf("4.删除学生信息 \n\n");
printf("5.排名学生成绩 \n\n");
printf("6.浏览所有学生信息 \n\n");
printf("7.清除所有数据 \n\n");
printf("8.查询排名 \n\n");
printf("0.退出 \n\n");
printf("输入相应的功能序号:");
select=getchar();
if(select==‘1‘||select==‘2‘||select==‘3‘||select==‘4‘||select==‘5‘||select==‘6‘||select==‘7‘||select==‘8‘||select==‘0‘)
return select;
system("cls");
continue;
}
}

//-------------------------------------1.录入学生信息----------------------------------------
void InputInfo()
{
int i,n;
printf("需要录入多少位学生的信息:");
scanf("%d",&n);
system("cls");
for(i=1;i<=n;i++)
{
student[counter]=input();
counter++;
}
PM=0;
SortInfo(student);
SaveStruct(student,sizeof(struct student_info),counter,"student_info.dat");
SaveInt(&counter,sizeof(counter),1,"counter.dat");
}

//-------------------------------------2.游览学生信息----------------------------------------
void view()
{
int i,num;
printf("请输入需要游览的学生信息的学号:");
scanf("%d",&num);
getchar();
if((i=NumExist(student,num))==-1)
{
printf("不存在该学号,按回车键返回...");
getchar();
system("cls");
return;
}
ViewInfo(&student[i]);
printf("\n按回车键返回...");
getchar();
system("cls");
return;
}

//-------------------------------------3.修改学生信息----------------------------------------
void xiugai()
{
int i,num;
char YN,select;
printf("请输入需要修改的学生信息的学号:");
scanf("%d",&num);
getchar();
if((i=NumExist(student,num))==-1)
{
printf("不存在该学号,按回车键返回...");
getchar();
system("cls");
return;
}
ViewInfo(&student[i]);
printf("是否要修改？(Y/N):");
scanf("%c",&YN);
getchar();
if(YN !=‘Y‘&& YN !=‘y‘)
{
printf("修改取消.");
getchar();
system("cls");
return;
}
system("cls");
printf("1.学号 \n");
printf("2.性别 \n");
printf("3.家庭住址 \n");
printf("4.联系电话 \n");
printf("5.语文成绩 \n");
printf("6.数学成绩 \n");
printf("7.外语成绩 \n");
printf("8.同学互评分 \n");
printf("9.品德成绩 \n");
printf("0.任课教师教师评分 \n");
scanf("%c",&select);
switch(select)
{
case ‘1‘:printf("修改学号:");scanf("%d",&student[i].num);break;
case ‘2‘:printf("修改性别:");scanf("%s",&student[i].sex);break;
case ‘3‘:printf("修改家庭住址:");scanf("%s",&student[i].adress);break;
case ‘4‘:printf("修改联系电话:");scanf("%s",&student[i].tel);break;
case ‘5‘:printf("修改语文成绩:");scanf("%d",&student[i].chinese);break;
case ‘6‘:printf("修改数学成绩:");scanf("%d",&student[i].math);break;
case ‘7‘:printf("修改外语成绩:");scanf("%d",&student[i].english);break;
case ‘8‘:printf("修改同学互评分:");scanf("%d",&student[i].huping);break;
case ‘9‘:printf("修改品德成绩:");scanf("%d",&student[i].pingde);break;
case ‘0‘:printf("修改任课教师评分:");scanf("%d",&student[i].jiaoping);break;
}
SortInfo(student);
SaveStruct(student,sizeof(struct student_info),counter,"student_info.dat");
PM=0;
getchar();
printf("修改完成...");
getchar();
system("cls");
}

//-------------------------------------4.删除学生信息----------------------------------------
void DeleteInfo()
{

int i,j,num;
char YN;
printf("请输入要删除的学生信息学号:");
scanf("%d",&num);
getchar();
if((i=NumExist(student,num))==-1)
{
printf("没有该学号,按回车键返回...");
getchar();
system("cls");
return;
}

ViewInfo(&student[i]);
printf("\n确认删除(Y/N):");
scanf("%c",&YN);
getchar();
if(YN!=‘Y‘ && YN!=‘y‘)
{
printf("删除取消...");

}
else
{
for(j=i;j<counter-1;j++)
student[j]=student[j+1];
counter--;
PM=0;
SaveStruct(student,sizeof(struct student_info),counter,"student_info.dat");
SaveInt(&counter,sizeof(counter),counter,"counter.dat");
printf("删除完成...");
}

getchar();
system("cls");
}

//-------------------------------------平均分、综合分排名------------------------------------
void paiming1(struct student_info student[])
{
struct student_info *p[N],*temp;
int i,j;
for(i=0;i<counter;i++)
p[i]=&student[i];
for(i=0;i<counter-1;i++)
for(j=i+1;j<counter;j++)
{
if(p[i]->ave < p[j]->ave)
{
temp=p[i];
p[i]=p[j];
p[j]=temp;
}
}
for(i=0;i<counter;i++)
p[i]->paiming1=i+1;
printf("平均分排名完成...\n");

}

//综合测评分排名
void paiming2(struct student_info student[])
{
struct student_info *p[N],*temp;
int i,j;
for(i=0;i<counter;i++)
p[i]=&student[i];
for(i=0;i<counter-1;i++)
for(j=i+1;j<counter;j++)
{
if(p[i]->zhongping < p[j]->zhongping)
{
temp=p[i];
p[i]=p[j];
p[j]=temp;
}
}
for(i=0;i<counter;i++)
p[i]->paiming2=i+1;
printf("综合测评分排名完成...\n");
}

//----------------------------------6.浏览所有学生信息----------------------------------------
void ViewAll()
{
int i;
for(i=0;i<counter;i++)
{
ViewInfo(&student[i]);
printf("\n");
}
getchar();
printf("回车键返回...");
getchar();
system("cls");
}

//-------------------------------------7.清除所有信息----------------------------------------
void clean()
{
counter=0;
SaveInt(&counter,sizeof(counter),1,"counter.dat");
printf("清除完毕...");
getchar();
getchar();
system("cls");
}

//----------------------------------------8.查询排名----------------------------------------
void PaimingView()
{
int i,num;
printf("输入要查询的学号:");
scanf("%d",&num);
getchar();
i=NumExist(student,num);
if(i==-1)
{
printf("该学号不存在...");
getchar();
return;
}
if(PM==0)
{
printf("请先进行成绩排名...");
getchar();
return;
}
printf("%s的平均分排名%d\n",student[i].name,student[i].paiming1);
printf("%s的综合测评分排名%d\n",student[i].name,student[i].paiming2);
printf("按回车键返回...");
getchar();
return;
}

//----------------------------------------9.退出----------------------------------------
void exit()
{

printf("谢谢使用!\n");
exit(0);
}

 

//----------------------------------------输入信息函数----------------------------------------
struct student_info input()
{
struct student_info stu,*sp;
char YN;
sp=&stu;
while(1)
{
while(1)
{
printf("录入学号:");
scanf("%d",&sp->num);
getchar();
if(NumExist(student,sp->num)!=-1)
{
printf("该学号已存在,请重新输入...");
getchar();
system("cls");
continue;
}
break;
}
printf("录入姓名:");
gets(sp->name);
printf("录入性别:");
gets(sp->sex);
printf("录入家庭住址:");
gets(sp->adress);
printf("录入联系电话:");
gets(sp->tel);
printf("\n接下来录入成绩\n");
printf("语文:");
scanf("%d",&sp->chinese);
printf("数学:");
scanf("%d",&sp->math);
printf("英语:");
scanf("%d",&sp->english);
sp->ave=(sp->chinese+sp->math+sp->english)/3.0;
printf("同学互评:");
scanf("%d",&sp->huping);
printf("品德分数:");
scanf("%d",&sp->pingde);
printf("教师评价:");
scanf("%d",&sp->jiaoping);
getchar();
sp->zhongping=(sp->ave*0.6+sp->huping*0.1+sp->pingde*0.1+sp->jiaoping*0.2);
printf("录入完毕，确认信息是否正确(Y/N)");
YN=getchar();
getchar();
if(YN==‘Y‘|| YN==‘y‘)
break;
else
{
printf("按回车键重新录入信息。");
getchar();
system("cls");
continue;
}
}
system("cls");
return stu;
}

//----------------------------------------排序函数----------------------------------------
void SortInfo(struct student_info student[])
{
int i,j;
struct student_info temp;
for(i=0;i<counter-1;i++)
for(j=i+1;j<=counter-1;j++)
{
if(student[i].num<student[j].num)
{
temp=student[i];
student[i]=student[j];
student[j]=temp;
}
}
}

//----------------------------------------显示学生信息----------------------------------------
void ViewInfo(struct student_info *sp)
{
printf("学号\t姓名\t性别\t家庭住址\t联系电话\n");
printf("%d\t%s\t%s\t%s\t\t%s\n",sp->num,sp->name,sp->sex,sp->adress,sp->tel);
printf("语文\t数学\t英语\t互评\t品德\t教评\n");
printf("%d\t%d\t%d\t%d\t%d\t%d\t\n",sp->chinese,sp->math,sp->english,sp->huping,sp->pingde,sp->jiaoping);
printf("平均分\t综合分\n");
printf("%.2f\t%.2f\n",sp->ave,sp->zhongping);
if(PM==1)
{
printf("平均分排名\t综合测评分排名\n");
printf("%d\t\t%d\n",sp->paiming1,sp->paiming2);
}
}

//-----------------------------------信息存盘(结构体)----------------------------------------
void SaveStruct(struct student_info *sp,int size,int n,char filename[20])
{
FILE *fp;
fp=fopen(filename,"wb");
fwrite(sp,size,n,fp);
fclose(fp);
}

//-----------------------------------读取信息(结构体)----------------------------------------
void LoadStruct(struct student_info *sp,int size,int n,char filename[20])
{
FILE *fp;
fp=fopen(filename,"rb");
fread(sp,size,n,fp);
fclose(fp);

}

//-------------------------------------信息存盘(整型)----------------------------------------
void SaveInt(int *p,int size,int n,char filename[20])
{
FILE *fp;
fp=fopen(filename,"wb");
fwrite(p,size,n,fp);
fclose(fp);
}

//-------------------------------------读取信息(整型)----------------------------------------
void LoadInt(int *p,int size,int n,char filename[20])
{
FILE *fp;
fp=fopen(filename,"rb");
fread(p,size,n,fp);
fclose(fp);
}

//----------------------------------------检索学号----------------------------------------
int NumExist(struct student_info student[],int num)
{
int i;
for(i=0;i<counter;i++)
{
if(student[i].num==num)
return i;
}
return -1;
}