#include<string.h>
#include<stdlib.h>
#include<conio.h>
#define N 50//定义的学生数组的个数
#define M 1//定义的管理员数组的个数
int k//录入学生的个数
char read_door[20]//读取文件的"门"
void Add_data(int flag)//增加数据
void Count_score(int flag)//求平均成绩和总成绩
void Delete_data(int flag)//根据学号删除对应学生的成绩
int Landing(int key)//登录程序
void Load_data()//载入数据
void Updata_stu(int flag)
void Read_bigdoor(char *b)
void Rank_score(int way, int flag)//按照需求对对应的成绩排序
void Read_data(char read_door)//读取数据
void Read_door()//读取"门"值
void Read_main_flag(int *a)
void Read_k()
void Save_bigdoor(char *b)
void Save_data(int flag)//保存数据
void Save_door()//保存"门"值
void Save_main_flag(int *a)
void Save_k(int k)
void Screen_rank()
void Screen_search()
void Screen_stu()
void Screen_teacher()
void Screen_stu_teach()
void Screen_onlyteach()
void Search_data(int way, int flag)//按学号或姓名查找查找
static struct STUDENT//学生的信息
{
char num[10]
char name[10]
float score[3]
float sum
float aver
int rank[4]
}stu[N]
static struct TEACHER//教师的登录账号和密码
{
char num[10]
char code[10]
}teach[M] = { "18061124","991228" }
int main()
{
char bigdoor ='n'//教师可通过bigdoor控制学生的权限
char *c=&bigdoor
int order1, order2, order3//order为用户登录的指令
int door1, door2, door3
printf ("请输入管理员登录指令:\n")
gets(read_door)
if (strcmp(read_door,"Lu Chen")==0)
{
printf("欢迎使用,您目前是拥有最高权限的管理员,请输入您的账号和密码:\n\n")
printf("\n\n\n")
Screen_onlyteach()
door1 = Landing(1)
if (door1 == 2)
{
printf("\n账号或密码不正确")
return 0
}
}
else
{
Screen_stu_teach()
printf("请输入序号即选择登录选项:")
scanf("%d", &order1)
printf("\n\n")
door1 = Landing(order1)//door1确定用户的权限
switch (door1)//提示用户输入出错
{
case 1:
case 3: break
case 2:printf("\n输入的账号或密码有误")return 0
case 4:printf("\n输入的号码有误")return 0
}
}
if (door1 == 1)//老师界面
{
int flag = 0
int *p=&flag
char teach_read_key
printf("\n是否读取数据?(y/n):")
scanf("%*c%c",&teach_read_key)
if(teach_read_key=='y')
{
Read_k()
Read_door()
Read_main_flag(p)
Read_data(read_door[20])
}
printf("\n\n")
for (int count = 1count >0count++)//利用死循环来重复使用功能
{
Screen_teacher()
printf("\n请输入序号即选择登录选项:")
scanf("%d", &order2)
printf("\n\n")
if (order2 == 10)
break
switch (order2)
{
case 1:
{
Load_data()
flag=1
Save_main_flag(p)
Save_k(k)
}break
case 2:Updata_stu(flag)break
case 3:
{
Screen_search()
printf("请输入你想查询成绩的方式:")
scanf("%d", &door2)
Search_data(door2, flag)
}break
case 4:Add_data(flag)break
case 5:Delete_data(flag)break
case 6:
{
Screen_rank()
printf("请输入成绩序号来选择排序:")
scanf("%d", &door2)
Rank_score(door2, flag)
} break
case 7:
{
Save_data(flag)
Save_door()
Save_k(k)
} break
case 8:
{
bigdoor ='n'
Save_bigdoor(c)
}break
case 9:
{
bigdoor ='y'
Save_bigdoor(c)
}break
default:printf("您输入的序号有误!\n\n")
}
}
}
else//学生界面
{
Read_k()
Read_data('y')
for (int k = 1k >0k++)
{
Screen_stu()
printf("请输入下一步操作的序号:")
scanf("%d", &order3)
if (order3 == 3)
break
switch (order3)
{
case 1:
{
Screen_search()
printf("请输入你想查询成绩的方式")
scanf("%d", &door3)
Search_data(door3, 1)
}break
case 2:
{
Screen_rank()
printf("请输入成绩序号来选择排序:")
scanf("%d", &door3)
Rank_score(door3, 1)
}break
default:printf("输入的操作序号有误\n\n")
}
}
}
return 0
}
int Landing(int key)//登录程序
{
char num[10]
char code[10]
if (key == 1)
{
printf("请输入账号:")
scanf("%s", num)
printf("\n请输入密码:")
scanf("%s", code)
for (int i = 0i <Mi++)
if (strcmp(teach[i].num, num) == 0 &&strcmp(teach[i].code, code) == 0)//判断登陆账号和密码是否正确
return 1
else
return 2
}
else if (key == 2)
{
return 3
}
else
{
return 4
}
}
void Search_data(int way, int flag)//按学号或姓名查找查找
{
int Search_flag = 1
if (flag)
{
char num[10], name[10]
int i
if (way == 1)
{
printf("\n请输入学号:")
scanf("%s", num)
for (i = 0i <ki++)
{
if (strcmp(stu[i].num, num) == 0)//判断学号存不存在
{
printf("\n姓名:%s\n学号:%s\nsubject1:%f\nsubject2:%f\nsubject3:%f\nsum:%f\naver:%f\n", stu[i].name, stu[i].num, stu[i].score[0], stu[i].score[1], stu[i].score[2], stu[i].sum, stu[i].aver)
Search_flag = 0
break
}
}
if (Search_flag)
printf("\n您输入的学号有误\n")
}
else if (way == 2)
{
printf("\n请输入姓名:")
scanf("%s", name)
for (i = 0i <Ni++)
{
if (strcmp(stu[i].name, name) == 0)//判断姓名存不存在
{
printf("\n姓名:%s\n学号:%s\nsubject1:%f\nsubject2:%f\nsubject3:%f\nsum:%f\naver:%f\n", stu[i].name, stu[i].num, stu[i].score[0], stu[i].score[1], stu[i].score[2], stu[i].sum, stu[i].aver)
flag = 0
break
}
}
if (flag)
printf("\n输入的姓名有误\n")
}
else
printf("\n输入的序号有误\n")
}
else
{
printf("\n您还没有载入数据\n")
}
}
void Count_score(int flag)//求平均成绩和总成绩
{
if (flag)
{
for (int i = 0i <ki++)
{
stu[i].sum = stu[i].score[0] + stu[i].score[1] + stu[i].score[2]
stu[i].aver = stu[i].sum / 3
}
}
else
{
printf("\n您还没有载入数据\n")
}
}
void Load_data()//载入数据
{
printf("输入录入学生成绩个数:")
scanf("%d", &k)
for (int i = 0i <ki++)
{
scanf("%s%s%f%f%f", stu[i].num, stu[i].name, &stu[i].score[0], &stu[i].score[1], &stu[i].score[2])
Count_score(1)
}
}
void Rank_score(int way, int flag)//按照需求对对应的成绩排序
{
int i, j, n, temp
if (flag)
{
for (i = 0i <4i++)
for (j = 0j <kj++)
stu[j].rank[i] = j + 1
if (way == 1)
{
for (i = 0i <3i++)
for (j = 0j <kj++)
for (n = j + 1n <kn++)
if (stu[j].score[i] <stu[n].score[i])
{
temp = stu[j].rank[i]
stu[j].rank[i] = stu[n].rank[i]
stu[n].rank[i] = temp
}
printf("\n")
for (i = 0i <ki++)
printf("姓名:%s 学号:%s subject1:%d subject2:%d subject3:%d\n", stu[i].name, stu[i].num, stu[i].rank[0], stu[i].rank[1], stu[i].rank[2])
}
else if (way == 2)
{
for (j = 0j <kj++)
for (n = j + 1n <kn++)
if (stu[j].sum <stu[n].sum)
{
temp = stu[j].rank[3]
stu[j].rank[3] = stu[n].rank[3]
stu[n].rank[3] = temp
}
printf("\n")
for (i = 0i <ki++)
printf("姓名:%s 学号:%s sum: %d\n", stu[i].name, stu[i].num, stu[i].rank[3])
}
else
{
printf("\n输入的序号有误\n")
}
}
else
{
printf("\n您还没有载入数据\n")
}
}
void Delete_data(int flag)//根据学号删除对应学生的成绩
{
if (flag)
{
int i, j
char num[10]
printf("\n请输入您想要删除信息的学号:")
scanf("%s", num)
for (i = 0i <ki++)
{
if (strcmp(stu[i].num, num) == 0)
for (j = i + 1j <kj++)
{
stu[i] = stu[j]
Count_score(1)
}
}
k--
Save_k(k)
}
else
{
printf("\n您还没有载入数据\n")
}
}
void Updata_stu(int flag)//根据学号修改学生的成绩
{
int Updata_flag = 1
if (flag)
{
char num[10]
float subject1, subject2, subject3
printf("\n请输入您想要修改学生的学号:")
scanf("%s", num)
printf("\n请输入您想要更改的学生三科的成绩:")
scanf("%f%f%f", &subject1, &subject2, &subject3)
for (int i = 0i <ki++)
if (strcmp(stu[i].num, num) == 0)
{
stu[i].score[0] = subject1
stu[i].score[1] = subject2
stu[i].score[2] = subject3
Updata_flag = 0
Count_score(1)
}
if (Updata_flag)
{
printf("\n输入学号有误\n")
}
}
else
{
printf("\n您还没有载入数据\n")
}
}
void Save_data(int flag)//保存数据
{
if(flag)
{
FILE *fp
if((fp=fopen("load.txt","w"))==NULL)
{
printf("Save_data error!")
exit(0)
}
for(int i=0i<ki++)
{
fwrite(&stu[i],sizeof(STUDENT),1,fp)
}
fclose(fp)
printf("成功保存数据!\n\n")
read_door[20]='y'
}
else
{
printf("\n您还没有载入数据\n")
}
}
void Read_data(char read_door)//读取数据
{
if(read_door=='y')
{
FILE *fp
if((fp=fopen("load.txt","r"))==NULL)
{
printf("Read_data error!")
exit(0)
}
for(int i=0i<ki++)
{
fread(&stu[i],sizeof(STUDENT),1,fp)
}
fclose(fp)
}
else
{
printf("\n没有保存数据的记录\n")
}
}
void Save_door()//保存"门"值
{
FILE *fp
if((fp=fopen("door.txt","w"))==NULL)
{
printf("Save_door error!")
exit(0)
}
fputc(read_door[20],fp)
fclose(fp)
}
void Read_door()//读取"门"值
{
FILE *fp
if((fp=fopen("door.txt","r"))==NULL)
{
printf("Read_door error!")
exit(0)
}
read_door[20]=fgetc(fp)
fclose(fp)
}
void Save_main_flag(int *a)
{
FILE *fp
if((fp=fopen("flag.txt","w"))==NULL)
{
printf("Save_main_flag error!")
exit(0)
}
fprintf(fp,"%d",*a)
fclose(fp)
}
void Read_main_flag(int *a)
{
FILE *fp
if((fp=fopen("flag.txt","r"))==NULL)
{
printf("Read_main_flag error!")
exit(0)
}
fscanf(fp,"%d",a)
fclose(fp)
}
void Save_bigdoor(char *b)
{
FILE *fp
if((fp=fopen("bigdoor.txt","w"))==0)
{
printf("Save_bigdoor error!")
exit(0)
}
fputc(*b,fp)
fclose(fp)
}
void Read_bigdoor(char *b)
{
FILE *fp
if((fp=fopen("bigdoor.txt","r"))==0)
{
printf("Read_bigdoor error!")
exit(0)
}
*b=fgetc(fp)
fclose(fp)
}
void Save_k(int k)
{
FILE *fp
if((fp=fopen("k.txt","w"))==0)
{
printf("Save_k error!")
exit(0)
}
fprintf(fp,"%d",k)
fclose(fp)
}
void Read_k()
{
FILE *fp
if((fp=fopen("k.txt","r"))==0)
{
printf("Read_k error!")
exit(0)
}
fscanf(fp,"%d",&k)
fclose(fp)
}
void Add_data(int flag)//增加数据
{
int i, j,count=k
char num[10], name[10]
float subject1, subject2, subject3
if (flag)
{
printf("\n输入您想增加的数据条数:")
scanf("%d", &i)
for (j = 0j <ij++)
{
printf("\n输入增加的学生学号,姓名,三门科目成绩")
scanf("%s%s%f%f%f", num, name, &subject1, &subject2, &subject3)
strcpy(stu[count + j].num, num)
strcpy(stu[count+ j].name, name)
stu[count+ j].score[0] = subject1
stu[count + j].score[1] = subject2
stu[count+ j].score[2] = subject3
k++
Count_score(1)
}
Save_k(k)
}
else
{
printf("\n输入您想增加的数据条数:")
scanf("%d", &i)
for (j = 0j <ij++)
{
printf("\n输入增加的学生学号,姓名,三门科目成绩")
scanf("%s%s%f%f%f", num, name, &subject1, &subject2, &subject3)
strcpy(stu[j].num, num)
strcpy(stu[j].name, name)
stu[j].score[0] = subject1
stu[j].score[1] = subject2
stu[j].score[2] = subject3
k++
Count_score(1)
}
}
}
void Screen_search()//查询界面
{
printf("*****************学生成绩查询界面*******************\n\n\n")
printf("——————————————————————————\n")
printf("| ① 学生学号查询 |\n")
printf("| ② 学生姓名查询 |\n")
printf("——————————————————————————\n")
}
void Screen_rank()//成绩排名方式界面
{
printf("*****************学生成绩排名界面*******************\n\n\n")
printf("——————————————————————————\n")
printf("| ① subject |\n")
printf("| ② sum |\n")
printf("——————————————————————————\n")
}
void Screen_teacher()
{
printf("*****************教师管理操作界面*******************\n\n\n")
printf("——————————————————————————\n")
printf("| ① 数据载入 |\n")
printf("| ② 修改数据 |\n")
printf("| ③ 查询数据 |\n")
printf("| ④ 添加数据 |\n")
printf("| ⑤ 删除数据 |\n")
printf("| ⑥ 成绩排序 |\n")
printf("| ⑦ 保存数据 |\n")
printf("| ⑧ 学生限制 |\n")
printf("| ⑨ 学生开放 |\n")
printf("| ⑩ 退出 |\n")
printf("——————————————————————————\n")
}
void Screen_stu_teach()
{
printf("*****************学生成绩管理系统*******************\n\n\n")
printf("——————————————————————————\n")
printf("| ① 教师管理员登录 |\n")
printf("| ② 学生端登录 |\n")
printf("——————————————————————————\n")
}
void Screen_onlyteach()
{
printf("*****************教师登陆操作界面*******************\n\n\n")
printf("——————————————————————————\n")
printf("| ① 教师管理员登录 |\n")
printf("——————————————————————————\n")
}
void Screen_stu()
{
printf("*****************学生用户操作界面*******************\n\n\n")
printf("——————————————————————————\n")
printf("| ① 学生成绩查询 |\n")
printf("| ② 成绩排名查询 |\n")
printf("| ③ 退出 |\n")
printf("——————————————————————————\n")
}
以上内容仅是本人通过多方浏览网上资料,自己敲出来的。
如有问题,大家可以在评论区下方留言!!!
本人已亲测,可用
C语言编程的规则C语言源程序的编程语法归纳如下:
1,强制性规则
1,一个C语言源程序必须有且只有一个MAIN函数.
2,函数名后必须紧跟圆括号对,函数体放在右圆括号")"后的花括号对"{}"中.
3,每个程序体(包括函数的函数体,含有多条语句的选择结构和循环结构中的语句序列)必须用一对花括号括起来.
4,文件包含预处理命令,#INCLUDE<*.H应置于源程序的开始位置.
5,语句未尾必须有分号,而预处理命令和函数首部的未尾及右花括号之后不要分号.
6,同一字母大,小写意义不同,关键字和标准库函数名必须用小写.
7,变量必须先定义,后使用
8,除已有明显间隔符外,标识符,关键字之间必须有至少一个空格9,注解必须包含在"/* */符号之间