学生管理系统.doc

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#define N 50
#define OLDFILE "score.dat"
#define NUMFILE "std.dat"
#define AVEFILE "sort.dat"
#define NEXTFILE "next.dat"

typedef struct {
int number;
char name[20];
int score[5];
float average;
}stu;

int readfile(char *file, stu *record);
void writefile(char *file, stu *record,int stunum);
void mycreate();
void display(char *file);
void stamenu();
void numsort();
void stagrade();
void managemenu();
void makeup_note();
void leave_note();
void new_list();
void avesort();

void main() {
char choose = 0;
do {
printf("请选择你需要的服务 \n");
printf("1. 创建学生记录\n");
printf("2. 查询菜单\n");
printf("3. 管理菜单\n");
printf("4. 文盲慎入\n");
printf("0. 退出系统\n");
scanf("%c", &choose);

switch(choose) {
case '1':
mycreate();
break;
case '2':
stamenu();
break;
case '3':
managemenu();
break;
case '4':
printf("\n\t\t请自己实现创新功能！");
getchar();
break;
case '0':
exit(0);
default:
printf("\n\t\t%c为非法选项！\n",choose);
break;
}
} while(1);

}

int readfile(char *file, stu *record)
{ int i = 0, j = 0;
float ave = 0.0;
FILE *fp = NULL;

fp = fopen(file, "r");
if(fp == NULL) {
printf("Can't open the file!\n");
return -1;
}
while ((feof(fp)) == 0)
{
fscanf(fp,"%5d%20s", &record[i].number, record[i].name);
for(j = 0; j < 5; j++)
fscanf(fp, "%5d", &record[i].score[j]);
fscanf(fp, "%f\n", &ave);
record[i].average = ave;
i++;

if (i >= N) {
printf("读取文件出错, 按任意键并关闭系统!/n");
getchar();
exit(0);
}

}
fclose(fp);
return i;
}

void writefile(char * file, stu * record, int stunum)
{
int i = 0, j = 0;
FILE *fp = NULL;

for(i = 0; i < stunum; i++)
{
fprintf(fp, "%5d%20s", record[i].number, record[i].name);
for(j = 0; j < 5; j++)
fprintf(fp, "%5d", record[i].score[j]);
fprintf(fp, "6.1If\n", record[i].average);
}
fclose(fp);
}

void mycreate()
{
int i = 0, j = 0, f = 0, number = 0;
char yes_no = '\0';
stu record[N] = {0};

i = readfile(OLDFILE, record);
if (i < 0) {
printf("文件为空，请从头创建学生记录! \n");
i = 0;
}
do {
if (i >= N) {
printf("超出存储范围, 保存并退出输入. \n");
break;
}
printf(" 第%d个学生\n",i+1);
do {
f = 0;
printf("\n 学号:");
scanf("%d", &number);
for(j = 0; j <= i; j++)
if(record[j].number == number) {
printf("学号有误, 请重新输入....... \n");
f = 1;
break;
}
} while(f == 1);
record[i].number = number;
printf("\n 姓名:"); scanf("%s",record[i].name);
printf("\n 数学成绩:"); scanf("%d", &record[i].score[0]);
printf("\n 英语成绩:"); scanf("%d", &record[i].score[1]);
printf("\n 物理成绩:"); scanf("%d", &record[i].score[2]);
printf("\n 编程成绩:"); scanf("%d", &record[i].score[3]);
printf("\n 马哲成绩:"); scanf("%d", &record[i].score[4]);

record[i].average=0;
i++;
getchar();
do {
printf("\n 要继续吗 (Y/N)?\n");
scanf("%c", &yes_no);
} while(yes_no != 'Y' && yes_no != 'y' && yes_no != 'N' && yes_no!='n');
} while(yes_no == 'y'|| yes_no == 'Y');
writefile(OLDFILE, record, i);
printf("以下是对已输入学生信息的确认!\n");
display(OLDFILE);
getchar();
}

void display(char * file)
{
stu student_info[N] = {0};
int stu_num = 0, i = 0, j = 0;
stu_num = readfile(file, student_info);
if (stu_num <= 0 || stu_num > N) {
printf("读取文件出错, 按任意键并关闭系统!/n");
getchar();
exit(0);
}
for (i = 0; i < stu_num; i++) {
printf("学号: %d\n", student_info[i].number);
printf("姓名: %s\n", student_info[i].name);
printf("各门功课的分数如下: %d\n");
printf(" 数学成绩: %d", student_info[i].score[0]);
printf(" 英语成绩: %d", student_info[i].score[1]);
printf(" 物理成绩: %d", student_info[i].score[2]);
printf(" 编程成绩: %d", student_info[i].score[3]);
printf(" 马哲成绩: %d", student_info[i].score[4]);
printf("平均分: %d", student_info[i].average);
}
printf("确认完按任意键返回! \n");
getchar();
}
void stamenu()
{
char choose='\0';

do {
printf("请选择你需要的选项");
printf("1. 按学号排序");
printf("2. 按平均分并排序");
printf("3. 统计分数段");
printf("4. 返回上一层");
printf("0. 退出系统");

switch(choose) {
case '1':
numsort();
break; /*按学号排序*/
case '2':
avesort();
break; /*计算平均分并排序*/
case '3':
stagrade();
break; /*统计分数段*/
case '4':
return;
case '0':
exit(0);
default :
printf("\n\t\t%c为非法选项！\n", choose);
break;
}
}while(1);
}

//按学号排列
void numsort()
{
stu student_info[N] = {0};
int stu_num = 0, i = 0, j = 0;
int num, min, max;
stu temp;

stu_num = readfile(OLDFILE, student_info);
if (stu_num <= 0 || stu_num > N) {
printf("读取文件出错, 按任意键并关闭系统!/n");
getchar();
exit(0);
}
max = stu_num;
min = 0;

for (num = max - min; num > 0; num /= 2) {
for (i = min + num; i <= max; i += num) {
temp = student_info[i];

for (j = i - num; j >= 0 && student_info[j].number < temp.number; j -= num) {
student_info[j + num].average = student_info[j].average;
strcpy(student_info[j + num].name, student_info[j].name);
student_info[j + num].number = student_info[j].number;
strncpy((char *)student_info[j + num].score, (char *)student_info[j].score, sizeof(student_info[j].score));
}
student_info[j + num].average = temp.average;
strcpy(student_info[j + num].name, temp.name);
student_info[j + num].number = temp.number;
strncpy((char *)student_info[j + num].score, (char *)temp.score, sizeof(student_info[j].score));
}
}

}

//按平均成绩排列
void avesort()
{
stu student_info[N] = {0};
int stu_num = 0, i = 0, j = 0;
int num, min, max;
stu temp;

stu_num = readfile(OLDFILE, student_info);
if (stu_num <= 0 || stu_num > N) {
printf("读取文件出错, 按任意键并关闭系统!/n");
getchar();
exit(0);
}
max = stu_num;
min = 0;

for (num = max - min; num > 0; num /= 2) {
for (i = min + num; i <= max; i += num) {
temp = student_info[i];

for (j = i - num; j >= 0 && student_info[j].average < temp.average; j -= num) {
student_info[j + num].average = student_info[j].average;
strcpy(student_info[j + num].name, student_info[j].name);
student_info[j + num].number = student_info[j].number;
strncpy((char *)student_info[j + num].score, (char *)student_info[j].score, sizeof(student_info[j].score));
}
student_info[j + num].average = temp.average;
strcpy(student_info[j + num].name, temp.name);
student_info[j + num].number = temp.number;
strncpy((char *)student_info[j + num].score, (char *)temp.score, sizeof(student_info[j].score));
}
}
}

void stagrade()
{
stu record [N] = {0};
int i = 0, j, n = 0, count[5][5] = {0};

n = readfile(AVEFILE,record);
for(i = 0; i < n; i++) /*统计各学科各分数段人数，行表示科目，列表示分数段*/
{
for(j=0;j<5;j++)
if(record[i].score[j]>=90)
count[j][0]++;
else if(record[i].score[j]>=80 && record[i].score[j]<90)
count[j][1]++;
else if(record[i].score[j]>=70 && record[i].score[j]<80)
count[j][2]++;
else if(record[i].score[j]>=60 && record[i].score[j]<70)
count[j][3]++;
else count[j][4]++;
}

printf("全班数学成绩如下: \n");
for (i = 0; i < 4; i++) {
printf("%d 分以上的有 %d 人 \n", 100 - 10 * i, count[0][i]);
}
printf("不及格 %d 人 \n", count[0][i]);

printf("全班英语成绩如下: \n");
for (i = 0; i < 4; i++) {
printf("%d 分以上的有 %d 人 \n", 100 - 10 * i, count[1][i]);
}
printf("不及格 %d 人 \n", count[1][i]);

printf("全班物理成绩如下: \n");
for (i = 0; i < 4; i++) {
printf("%d 分以上的有 %d 人 \n", 100 - 10 * i, count[2][i]);
}
printf("不及格 %d 人 \n", count[2][i]);

printf("全班编程成绩如下: \n");
for (i = 0; i < 4; i++) {
printf("%d 分以上的有 %d 人 \n", 100 - 10 * i, count[3][i]);
}
printf("不及格 %d 人 \n", count[3][i]);

printf("全班马哲成绩如下: \n");
for (i = 0; i < 4; i++) {
printf("%d 分以上的有 %d 人 \n", 100 - 10 * i, count[4][i]);
}
printf("不及格 %d 人 \n", count[4][i]);

}

void managemenu()
{
char choose='\0';

do {
printf("请选择从菜单中选择你需要的选项");
printf("1. 生成并打印补考通知单");
printf("2. 生成并打印退学通知单");
printf("3. 生成并打印新名册");
printf("4. 返回上一层");

scanf("%c",&choose);
switch(choose)
{
case '1':
makeup_note();
break; /*生成并打印补考通知单*/
case '2':
leave_note();
break; /* 生成并打印退学通知单*/
case '3':
new_list();
break; /*生成并打印新名册*/
case '4':
return;
case '0':
exit(0); /*返回*/
default:
printf("\n\t\t%c为非法选项!\n", choose);
}
} while(1);
}

void makeup_note() {
stu record[N]={0};
int i=0,j=0,n=0,t=0,count=0,time[5]={0},f=0;
char site[5];
char sl[6]={0};

n = readfile(OLDFILE, record);
for(i = 0; i < 5; i++) {
switch(i)
{
case 0:
strcpy(sl,"数学");
break;
case 1:
strcpy(sl,"英语");
break;
case 2:
strcpy(sl,"物理");
break;
case 3:
strcpy(sl,"编程");
break;
case 4:
strcpy(sl,"马哲");
break;
}
printf("\n\n 请输入科目%s补考时间(偶数的整点时间: 8 - 18点):", sl);
do {
f=0;
scanf("%d",&t);
if(t%2!=0) {
printf("请输入偶数整点时间：");
f=1;
continue;
}
if(t<8 || t>18) {
printf("请输入8-18整点时间:");
f=1;
continue;
}
for(j=0;j<i;j++)
if(t==time[j]) {
printf("与其他时间冲突！请重新输入：");
f=i;
break;
}
} while(f == 1);
time[i] = t;
printf("输入%s的补考地点，4位数字的教室号：如1001", sl);
scanf("%s", site);
site[4] = '\0';

printf("%s补考安排信息如下, 按任意键确认! \n", sl);
printf("科目: %s, 时间: %d, 教室: %s! \n", sl, time[i], site);
getchar();
}

}
void leave_note() {

}

void new_list()
{
stu record[N]={0};
int i=0,j=0,n=0,count=0;

n = readfile(OLDFILE, record);
for(i=0;i<n;i++)
{
count=0;
for(j=0;j<5;j++)

if(record[i].score[j]<60) count++;
if(count>3) {
for(j=i;j<n-1;j++)
record[j]=record[j+1];
i--;
n--;
}
}
writefile(NEXTFILE,record,n);
display(NEXTFILE);
}