#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#include <conio.h>
//定义结构体记录学生基本信息
struct messages
{
int Class[5]; //班级
char StudentNum[10]; //学号
char Sname[10]; //姓名
char Gender[4]; //性别
int Age; //年龄
int Course[20]; //课程编号
char Cname[20]; //课程名称
int Point; //学分
int Fgrade; //考试成绩
int Dgrade; //平时成绩
double Agrade; //综合成绩
int Course1[20]; //课程编号
char Cname1[20]; //课程名称
int Point1; //学分
int Fgrade1; //考试成绩
int Dgrade1; //平时成绩
double Agrade1; //综合成绩
int Course2[20]; //课程编号
char Cname2[20]; //课程名称
int Point2; //学分
int Fgrade2; //考试成绩
int Dgrade2; //平时成绩
double Agrade2; //综合成绩
};
//函数声明
void keys();//密码
void color(int x);//改变颜色
int welcome();//菜单欢迎界面
void SetPosition(int x, int y);//修改光标显示位置
void keyDown(char n);//按键响应
int wel2();//第二层欢迎界面
int wel3();//第三层欢迎界面
int wel4();//第四层欢迎界面
void Getin();//1.录入成绩
void change();//2.修改
void insert();//3.插入
int looking();//4.查询
void deleting();//5.删除
void average();//6.计算平均成绩
void list_under();//7.列出不合格学生成绩
int main(int argc, char *argv[])
{
system("mode con cols=90 lines=25");//改变窗口大小
system("title 学生成绩管理系统"); //更改控制台名称
keys();
while(1)
{
system("cls");
char n = welcome();//此处返回值代表需要进行的操作对应的标号;
system("cls");
keyDown(n);
}
return 0;
}
//0系列函数:准备部分,基础不牢,地动山摇!!!
//0.0改变颜色
void color(int x)
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),x);
}
//0.1改变输出坐标
void SetPosition(int x, int y)
{
COORD p;
HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
p.X = x;
p.Y = y;
SetConsoleCursorPosition(handle, p);
}
//0.2欢迎界面
int welcome()
{
color(14);
printf("\n\n\n\n\t\t=======================欢迎使用===========================\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t按键1:数据的录入 \t按键2:数据的修改\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t按键3:数据的插入 \t按键4:数据的查询\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t按键5:数据的删除 \t按键6:计算平均成绩\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t按键7:列出不及格学生清单\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t==========================================================\n");
color(11);
printf("\t\t\t请输入您想要进行的操作:[_](按键ESC退出)");
char n;
do
{
SetPosition(48, 19);
n = getch();//不带回显
if(n==27)
{
SetPosition(52, 20);
printf("您确定要退出程序(Y/N)?[_]");
SetPosition(52, 21);
printf(" ");
SetPosition(75, 20);
while(1)
{
n = getch();
if(n=='y' || n=='Y')
{
SetPosition(52, 21);
color(14);
printf("欢迎您的下次使用,再见!");
sleep(1);
exit(0);
}
else if(n=='n' || n=='N')
{
break;
}
else
{
SetPosition(52, 21);
printf("您的输入有误(Y/N)");
}
}
}
if(n>='1' && n<='7')
{
SetPosition(48, 19);
printf("%c", n);
break;
}
else
{
SetPosition(52, 21);
printf("请重新选择操作对象..");
SetPosition(52, 20);
printf(" ");
}
}while(1);
SetPosition(52, 21);
color(14);
SetPosition(52, 21);
printf("请按任意键继续......");
getch();
return n;
}
//0.3 第二层欢迎界面
int wel2()
{
system("mode con cols=90 lines=25");//改变窗口大小
color(14);
printf("\n\n\n\n\t\t=======================欢迎使用===========================\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t请选择您需要的查询方式:\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t按键1:按学号查找 \t按键2:按姓名查找\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t==========================================================\n");
SetPosition(38,15);
printf("请选择:[_]");
SetPosition(46,15);
int n;
while(1)
{
SetPosition(46,15);
n = getch();
if(n=='1' || n=='2')
{
printf("%c", n);
break;
}
else
{
SetPosition(50,16);
printf("您的选择有误,请重试...");
}
}
SetPosition(50,17);
system("pause");
return n;
}
//0.4 第三层欢迎菜单 --选择需要修改的信息内容
int wel3()
{
system("mode con cols=90 lines=25");//改变窗口大小
color(14);
printf("\n\n\n\n\t\t=======================欢迎使用===========================\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t请选择您需要的修改的信息:\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t按键1:修改学生信息 \t按键2:修改课程信息\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t==========================================================\n");
SetPosition(38,15);
printf("请选择:[_]");
SetPosition(46,15);
int n;
while(1)
{
SetPosition(46,15);
n = getch();
if(n=='1' || n=='2')
{
printf("%c", n);
break;
}
else
{
SetPosition(50,16);
printf("您的选择有误,请重试...");
}
}
SetPosition(50,16);
system("pause");
return n;
}
//0.5 读取文件信息
int read(FILE *fp, struct messages student[100])
{
int i = 0;
while(!feof(fp))//没有走到终点就继续读入
{
//班级,学号,姓名,性别,年龄
fscanf(fp, "%s", student[i].Class);
fscanf(fp, "%s", student[i].StudentNum);
fscanf(fp, "%s", student[i].Sname);
fscanf(fp, "%s", student[i].Gender);
fscanf(fp, "%d", &student[i].Age);
//课程编号,课程名称,学分,考试成绩,平时成绩,总成绩
fscanf(fp, "%s", student[i].Course);
fscanf(fp, "%s", student[i].Cname);
fscanf(fp, "%d", &student[i].Point);
fscanf(fp, "%d", &student[i].Fgrade);
fscanf(fp, "%d", &student[i].Dgrade);
fscanf(fp, "%lf", &student[i].Agrade);
//第二门
fscanf(fp, "%s", student[i].Course1);
fscanf(fp, "%s", student[i].Cname1);
fscanf(fp, "%d", &student[i].Point1);
fscanf(fp, "%d", &student[i].Fgrade1);
fscanf(fp, "%d", &student[i].Dgrade1);
fscanf(fp, "%lf", &student[i].Agrade1);
//第三门
fscanf(fp, "%s", student[i].Course2);
fscanf(fp, "%s", student[i].Cname2);
fscanf(fp, "%d", &student[i].Point2);
fscanf(fp, "%d", &student[i].Fgrade2);
fscanf(fp, "%d", &student[i].Dgrade2);
fscanf(fp, "%lf", &student[i].Agrade2);
i++;
}
fclose(fp);
return i;
}
//0.6 控制台打印
void Print(int i, struct messages student[100])
{
printf("班级:%s\n", student[i].Class);
printf("学号:%s\n", student[i].StudentNum);
printf("姓名:%s\n", student[i].Sname);
printf("性别:%s\n", student[i].Gender);
printf("年龄:%d\n", student[i].Age);
printf("-------第一门课程的相关信息-------\n");
printf("课程编号:%s\n", student[i].Course);
printf("课程名称:%s\n", student[i].Cname);
printf("学分:%d\n", student[i].Point);
printf("考试成绩:%d\n", student[i].Fgrade);
printf("平时成绩:%d\n", student[i].Dgrade);
printf("总成绩:%0.2lf\n", student[i].Agrade);
printf("-------第二门课程的相关信息-------\n");
printf("课程编号:%s\n", student[i].Course1);
printf("课程名称:%s\n", student[i].Cname1);
printf("学分:%d\n", student[i].Point1);
printf("考试成绩:%d\n", student[i].Fgrade1);
printf("平时成绩:%d\n", student[i].Dgrade1);
printf("总成绩:%0.2lf\n", student[i].Agrade1);
printf("-------第三门课程的相关信息-------\n");
printf("课程编号:%s\n", student[i].Course2);
printf("课程名称:%s\n", student[i].Cname2);
printf("学分:%d\n", student[i].Point2);
printf("考试成绩:%d\n", student[i].Fgrade2);
printf("平时成绩:%d\n", student[i].Dgrade2);
printf("总成绩:%0.2lf\n", student[i].Agrade2);
}
//0.7 四级菜单-->选择需要更改的科目
int wel4()
{
system("mode con cols=90 lines=25");//改变窗口大小
color(14);
printf("\n\n\n\n\t\t=======================欢迎使用===========================\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t请选择您需要的修改的科目:\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t按键1:科目1\t按键2:科目2\t按键3:科目3\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t==========================================================\n");
SetPosition(38,15);
printf("请选择:[_]");
SetPosition(46,15);
int n;
while(1)
{
n = getch();
if(n=='1' || n=='2' || n=='3')
{
printf("%c", n);
break;
}
else
printf("您的选择有误,请重试...");
}
SetPosition(50,16);
system("pause");
return n;
}
//0.8 按键相应
void keyDown(char n)
{
switch(n)
{
case '1': //数据录入
{
Getin();
break;
}
case '2':
{ //数据修改
change();
break;
}
case '3':
{ insert();
break;
}
case '4':
{ //数据查询
looking();
break;
}
case '5':
{ //数据删除
deleting();
break;
}
case '6':
{ //平均成绩计算
average();
break;
}
case '7':
{ //列出不及格学生的清单
list_under();
break;
}
}
}
//1、数据的录入//over
void Getin()
{
system("cls");
FILE *fp = fopen("score.txt", "a+");
if(fp == NULL)
{
printf("打开文件失败,请重试!\n按任意键退出\n");
getch();
fclose(fp);
exit(0);
}
int count = 0;
printf("请输入您要录入数据的人数:");
scanf("%d", &count);
struct messages student[100];
int i = 0;
for(i=0; i<count; i++)//录入信息提示
{
printf("请录入第%d个学生的信息:\n", i+1);
printf("班级:");
scanf("%s", &student[i].Class);
printf("学号:");
scanf("%s", &student[i].StudentNum);
printf("姓名:");
scanf("%s", &student[i].Sname);
printf("性别:");
scanf("%s", &student[i].Gender);
printf("年龄:");
scanf("%d", &student[i].Age);
printf("-------第一门课程的相关信息-------\n");
printf("课程编号:");
scanf("%s", &student[i].Course);
printf("课程名称:");
scanf("%s", &student[i].Cname);
printf("学分:");
scanf("%d", &student[i].Point);
printf("考试成绩:");
scanf("%d", &student[i].Fgrade);
printf("平时成绩:");
scanf("%d", &student[i].Dgrade);
student[i].Agrade = student[i].Fgrade*0.7 + student[i].Dgrade*0.3;//综合成绩
printf("-------第二门课程的相关信息-------\n");
printf("课程编号:");
scanf("%s", &student[i].Course1);
printf("课程名称:");
scanf("%s", &student[i].Cname1);
printf("学分:");
scanf("%d", &student[i].Point1);
printf("考试成绩:");
scanf("%d", &student[i].Fgrade1);
printf("平时成绩:");
scanf("%d", &student[i].Dgrade1);
student[i].Agrade1 = student[i].Fgrade1 * 0.7 + student[i].Dgrade1 * 0.3;//综合成绩
printf("-------第三门课程的相关信息-------\n");
printf("课程编号:");
scanf("%s", &student[i].Course2);
printf("课程名称:");
scanf("%s", &student[i].Cname2);
printf("学分:");
scanf("%d", &student[i].Point2);
printf("考试成绩:");
scanf("%d", &student[i].Fgrade2);
printf("平时成绩:");
scanf("%d", &student[i].Dgrade2);
student[i].Agrade2 = student[i].Fgrade2 * 0.7 + student[i].Dgrade2 * 0.3;//综合成绩
//班级,学号,姓名,性别, 年龄
fprintf(fp, "%s %s %s %s %d", student[i].Class, student[i].StudentNum, student[i].Sname, student[i].Gender, student[i].Age);
//课程编号,课程名称,学分
fprintf(fp, " %s %s %d ", student[i].Course, student[i].Cname, student[i].Point);
//考试成绩,平时成绩,总成绩
fprintf(fp, "%d %d %0.2lf ", student[i].Fgrade, student[i].Dgrade, student[i].Agrade);
fprintf(fp, " %s %s %d ", student[i].Course1, student[i].Cname1, student[i].Point1);
fprintf(fp, "%d %d %0.2lf ", student[i].Fgrade1, student[i].Dgrade1, student[i].Agrade1);
fprintf(fp, " %s %s %d ", student[i].Course2, student[i].Cname2, student[i].Point2);
fprintf(fp, "%d %d %0.2lf\n", student[i].Fgrade2, student[i].Dgrade2, student[i].Agrade2);
}
fclose(fp);
printf("添加学生成功,");
system("pause");
}
//2.数据的修改//over
void change()
{
FILE *fp = fopen("score.txt", "r");
if(fp == NULL)
{
printf("文件打开失败,请重试...\n");
system("pause");
fclose(fp);
exit(0);
}
//读入
struct messages student[100];
int i = read(fp, student);//i是学生人数
fclose(fp);
if(i==0)
{
printf("该文本中已无学生信息\n");
system("pause");
return;
}
int angle = looking();//需要修改信息处的角标
int n = wel3() - 48;
system("cls");
switch(n)
{
case 1://修改学生信息
{
printf("请重新录入该学生的信息:\n");
printf("班级:");
scanf("%s", &student[angle].Class);
printf("学号:");
scanf("%s", &student[angle].StudentNum);
printf("姓名:");
scanf("%s", &student[angle].Sname);
printf("性别:");
scanf("%s", &student[angle].Gender);
printf("年龄:");
scanf("%d", &student[angle].Age);
break;
}
case 2://修改课程信息
{
int n = wel4() - 48;
system("cls");
switch(n)
{
case 1:
{
printf("-------第一门课程的相关信息-------\n");
printf("课程编号:");
scanf("%s", &student[angle].Course);
printf("课程名称:");
scanf("%s", &student[angle].Cname);
printf("学分:");
scanf("%d", &student[angle].Point);
printf("考试成绩:");
scanf("%d", &student[angle].Fgrade);
printf("平时成绩:");
scanf("%d", &student[angle].Dgrade);
student[angle].Agrade = student[angle].Fgrade*0.7 + student[angle].Dgrade*0.3;//综合成绩
break;
}
case 2:
{
printf("-------第二门课程的相关信息-------\n");
printf("课程编号:");
scanf("%s", &student[angle].Course1);
printf("课程名称:");
scanf("%s", &student[angle].Cname1);
printf("学分:");
scanf("%d", &student[angle].Point1);
printf("考试成绩:");
scanf("%d", &student[angle].Fgrade1);
printf("平时成绩:");
scanf("%d", &student[angle].Dgrade1);
student[angle].Agrade1 = student[angle].Fgrade1 * 0.7 + student[angle].Dgrade2 * 0.3;//综合成绩
break;
}
case 3:
{
printf("-------第三门课程的相关信息-------\n");
printf("课程编号:");
scanf("%s", &student[angle].Course2);
printf("课程名称:");
scanf("%s", &student[angle].Cname2);
printf("学分:");
scanf("%d", &student[angle].Point2);
printf("考试成绩:");
scanf("%d", &student[angle].Fgrade2);
printf("平时成绩:");
scanf("%d", &student[angle].Dgrade2);
student[angle].Agrade2 = student[angle].Fgrade2 * 0.7 + student[angle].Dgrade2 * 0.3;//综合成绩
break;
}
}
break;
}
}
fp = fopen("score.txt", "w");
if(fp == NULL)
{
printf("文件打开失败,请重试...\n");
system("pause");
fclose(fp);
exit(0);
}
int j = 0;
for(j=0; j<i-1; j++)
{
//班级,学号,姓名,性别, 年龄
fprintf(fp, "%s %s %s %s %d", student[j].Class, student[j].StudentNum, student[j].Sname, student[j].Gender, student[j].Age);
//课程编号,课程名称,学分
fprintf(fp, " %s %s %d ", student[j].Course, student[j].Cname, student[j].Point);
//考试成绩,平时成绩,总成绩
fprintf(fp, "%d %d %0.2lf ", student[j].Fgrade, student[j].Dgrade, student[j].Agrade);
//课程编号,课程名称,学分
fprintf(fp, " %s %s %d ", student[j].Course1, student[j].Cname1, student[j].Point1);
//考试成绩,平时成绩,总成绩
fprintf(fp, "%d %d %0.2lf ", student[j].Fgrade1, student[j].Dgrade1, student[j].Agrade1);
//课程编号,课程名称,学分
fprintf(fp, " %s %s %d ", student[j].Course2, student[j].Cname2, student[j].Point2);
//考试成绩,平时成绩,总成绩
fprintf(fp, "%d %d %0.2lf\n", student[j].Fgrade2, student[j].Dgrade2, student[j].Agrade2);
}
fclose(fp);
printf("该学生的信息已更改成功\n");
system("pause");
}
//3.数据的插入//over
void insert()
{
struct messages student[100];
struct messages Afterstu[101];
FILE *fp = fopen("score.txt", "r");
if(fp == NULL)
{
printf("文件打开失败,请重试...\n");
system("pause");
fclose(fp);
exit(0);
}
int i = read(fp, student);//索引上限
fclose(fp);
if(i==0)
{
printf("该文本中已无学生信息\n");
system("pause");
return;
}//特殊情况
else
printf("现在文本中有%d名学生的信息,您想要将该学生的信息放在第几位?\n", i-1);
int angle = 0;//记录插入文本的角标
scanf("%d", &angle);
angle--;//角标=位置-1
//将处理后的数据存下来
int j = 0;
int k = 0;
for(j=0; k<i; j++)
{
if(k==angle)
j++;
Afterstu[j] = student[k];
k++;
}
//录入插入学生的信息
printf("请录入该学生的信息:\n");
printf("班级:");
scanf("%s", &Afterstu[angle].Class);
printf("学号:");
scanf("%s", &Afterstu[angle].StudentNum);
printf("姓名:");
scanf("%s", &Afterstu[angle].Sname);
printf("性别:");
scanf("%s", &Afterstu[angle].Gender);
printf("年龄:");
scanf("%d", &Afterstu[angle].Age);
printf("-------第一门课程的相关信息-------\n");
printf("课程编号:");
scanf("%s", &Afterstu[angle].Course);
printf("课程名称:");
scanf("%s", &Afterstu[angle].Cname);
printf("学分:");
scanf("%d", &Afterstu[angle].Point);
printf("考试成绩:");
scanf("%d", &Afterstu[angle].Fgrade);
printf("平时成绩:");
scanf("%d", &Afterstu[angle].Dgrade);
Afterstu[angle].Agrade = Afterstu[angle].Fgrade * 0.7 + Afterstu[angle].Dgrade * 0.3;//综合成绩
printf("-------第二门课程的相关信息-------\n");
printf("课程编号:");
scanf("%s", &Afterstu[angle].Course1);
printf("课程名称:");
scanf("%s", &Afterstu[angle].Cname1);
printf("学分:");
scanf("%d", &Afterstu[angle].Point1);
printf("考试成绩:");
scanf("%d", &Afterstu[angle].Fgrade1);
printf("平时成绩:");
scanf("%d", &Afterstu[angle].Dgrade1);
Afterstu[angle].Agrade1 = Afterstu[angle].Fgrade1 * 0.7 + Afterstu[angle].Dgrade1 * 0.3;//综合成绩
printf("-------第三门课程的相关信息-------\n");
printf("课程编号:");
scanf("%s", &Afterstu[angle].Course2);
printf("课程名称:");
scanf("%s", &Afterstu[angle].Cname2);
printf("学分:");
scanf("%d", &Afterstu[angle].Point2);
printf("考试成绩:");
scanf("%d", &Afterstu[angle].Fgrade2);
printf("平时成绩:");
scanf("%d", &Afterstu[angle].Dgrade2);
Afterstu[angle].Agrade2 = Afterstu[angle].Fgrade2 * 0.7 + Afterstu[angle].Dgrade2 * 0.3;//综合成绩
//重新录入至文件中
fp = fopen("score.txt", "w");
for(j=0; j<i; j++)
{
//班级,学号,姓名,性别
fprintf(fp, "%s %s %s %s ", Afterstu[j].Class, Afterstu[j].StudentNum, Afterstu[j].Sname, Afterstu[j].Gender);
//年龄,课程编号,课程名称,学分
fprintf(fp, "%d %s %s %d ", Afterstu[j].Age, Afterstu[j].Course, Afterstu[j].Cname, Afterstu[j].Point);
//考试成绩,平时成绩,总成绩
fprintf(fp, "%d %d %0.2lf", Afterstu[j].Fgrade, Afterstu[j].Dgrade, Afterstu[j].Agrade);
fprintf(fp, " %s %s %d ", Afterstu[j].Course1, Afterstu[j].Cname1, Afterstu[j].Point1);
fprintf(fp, "%d %d %0.2lf ", Afterstu[j].Fgrade1, Afterstu[j].Dgrade1, Afterstu[j].Agrade1);
fprintf(fp, " %s %s %d ", Afterstu[j].Course2, Afterstu[j].Cname2, Afterstu[j].Point2);
fprintf(fp, "%d %d %0.2lf\n", Afterstu[j].Fgrade2, Afterstu[j].Dgrade2, Afterstu[j].Agrade2);
}
fclose(fp);
printf("该学生的信息已插入\n");
system("pause");
}
//4、数据的查询//over
int looking()
{
FILE *fp = fopen("score.txt", "r");
if(fp == NULL)
{
printf("文件打开失败,请重试...\n");
system("pause");
fclose(fp);
exit(0);
}
//读入
struct messages student[100];
int i = read(fp, student);
if(i==0)
{
printf("该文本中已无学生信息\n");
system("pause");
return;
}
int n = wel2() - 48;
system("cls");
int angle = 0;//记录寻找文本的角标
int flag = 0;//记录是否找到
switch(n)
{
case 1:
{
printf("请输入您要查询信息的学生的学号:\n");
char StudentNum[10];
scanf("%s", &StudentNum);
int j = 0;
for(j=0; j<i; j++)
{
if(strcmp(StudentNum, student[j].StudentNum) == 0)
{
flag = 1;
angle = j;//角标
}
}
break;
}
case 2:
{
printf("请输入您要查询的学生的姓名:\n");
char studentName[10];
scanf("%s", &studentName);
int j = 0;
for(j=0; j<i; j++)
{
if(strcmp(studentName, student[j].Sname) == 0)
{
flag = 1;
angle = j;//角标
}
}
break;
}
}
if(flag == 0)
{
printf("没有找到该学生的信息\n");
system("pause");
return;
}//两个特殊情况
else
{
printf("您查询的学生相关信息如下:\n");
system("mode con cols=90 lines=30");//改变窗口大小
Print(angle, student);
}
fclose(fp);
SetPosition(60, 27);
system("pause");
return angle;
}
//5.数据的删除//over
void deleting()
{
struct messages student[100];
struct messages Afterstu[99];
char StudentNum[10];
FILE *fp = fopen("score.txt", "r");
if(fp == NULL)
{
printf("文件打开失败,请重试...\n");
system("pause");
fclose(fp);
exit(0);
}
int i = read(fp, student);//索引上限
if(i == 0)
{
printf("该文本中已无学生信息\n");
system("pause");
return;
}
int angle = 0;//记录删除文本的角标
int flag = 0;//记录是否找到
int n = wel2() - 48;
system("cls");
switch(n)
{
case 1:
{
printf("请输入您要删除信息的学生的学号:\n");
char StudentNum[10];
scanf("%s", &StudentNum);
int j = 0;
for(j=0; j<i; j++)
{
if(strcmp(StudentNum, student[j].StudentNum) == 0)
{
flag = 1;
angle = j;//角标
}
}
break;
}
case 2:
{
printf("请输入您要删除的学生的姓名:\n");
char studentName[10];
scanf("%s", &studentName);
int j = 0;
for(j=0; j<i; j++)
{
if(strcmp(studentName, student[j].Sname) == 0)
{
flag = 1;
angle = j;//角标
}
}
break;
}
}
if(flag == 0)
{
printf("没有找到该学生的信息\n");
system("pause");
return;
}//特殊情况
//将处理后的数据存下来
int j = 0;
int k = 0;
for(j=0; k<i; j++)
{
if(k==angle)
k++;
Afterstu[j] = student[k];
k++;
}
//重新录入至文件中
fp = fopen("score.txt", "w");
for(j=0; j<i-2; j++)
{
//综合成绩
Afterstu[j].Agrade = Afterstu[j].Fgrade * 0.7 + Afterstu[j].Dgrade * 0.3;
Afterstu[j].Agrade1 = Afterstu[j].Fgrade1 * 0.7 + Afterstu[j].Dgrade1 * 0.3;
Afterstu[j].Agrade2 = Afterstu[j].Fgrade2 * 0.7 + Afterstu[j].Dgrade2 * 0.3;
//班级,学号,姓名,性别
fprintf(fp, "%s %s %s %s ", Afterstu[j].Class, Afterstu[j].StudentNum, Afterstu[j].Sname, Afterstu[j].Gender);
//年龄,课程编号,课程名称,学分
fprintf(fp, "%d %s %s %d ", Afterstu[j].Age, Afterstu[j].Course, Afterstu[j].Cname, Afterstu[j].Point);
//考试成绩,平时成绩,总成绩
fprintf(fp, "%d %d %0.2lf ", Afterstu[j].Fgrade, Afterstu[j].Dgrade, Afterstu[j].Agrade);
fprintf(fp, "%s %s %d ", Afterstu[j].Course1, Afterstu[j].Cname1, Afterstu[j].Point1);
fprintf(fp, "%d %d %0.2lf ", Afterstu[j].Fgrade1, Afterstu[j].Dgrade1, Afterstu[j].Agrade1);
fprintf(fp, "%s %s %d ", Afterstu[j].Course2, Afterstu[j].Cname2, Afterstu[j].Point2);
fprintf(fp, "%d %d %0.2lf\n", Afterstu[j].Fgrade2, Afterstu[j].Dgrade2, Afterstu[j].Agrade2);
}
fclose(fp);
printf("该学生的信息已删除\n");
system("pause");
}
//6.平均成绩的计算//over
void average()
{
FILE *fp = fopen("score.txt", "r");
if(fp == NULL)
{
printf("文件打开失败,请重试...\n");
system("pause");
fclose(fp);
exit(0);
}
//读入
struct messages student[100];
double scores[100] = {0};//用于记录每一位学生的平均成绩；
int num[100] = {-1};//用于从平均成绩从高到低地记录学生信息；
int i = read(fp, student);//i是学生人数
fclose(fp);
if(i==0)
{
printf("该文本中已无学生信息\n");
system("pause");
return;
}
int j = 0;
for(j=0; j<i-1; j++)
{
int all = student[j].Point + student[j].Point1 + student[j].Point2;
double temp = student[j].Point * student[j].Agrade / all;
double temp1 = student[j].Point1 * student[j].Agrade1 / all;
double temp2 = student[j].Point2 * student[j].Agrade2 / all;
scores[j] = temp + temp1 + temp2;
}
int flag[100];//flag用于标记这个位置的数字是否已经被选出
int k = 0, r = 0;
for(k=0; k<i-1; k++)
{
double max = -1;
for(j=0; j<i-1; j++)
{
if(max<scores[j] && !flag[j])
{
max = scores[j];//最大值更改;
r = j;//角标记录；
}
}//每次循环结束之后会选出一个最大值;
num[k] = r;
flag[r] = 1;//标记已访问;
}
printf("按照平均成绩降序输出如下:\n");
for(j=0; j<i-1; j++)
{
printf("------第%d名------\n", j+1);
printf("班级:%s\n", student[num[j]].Class);
printf("学号:%s\n", student[num[j]].StudentNum);
printf("姓名:%s\n", student[num[j]].Sname);
printf("性别:%s\n", student[num[j]].Gender);
printf("年龄:%d\n", student[num[j]].Age);
printf("平均成绩:%lf\n", scores[num[j]]);
//system("pause");
}
system("pause");
}
//7.列出不及格学生清单//over
void list_under()
{
FILE *fp = fopen("score.txt", "r");
if(fp == NULL)
{
printf("文件打开失败,请重试...\n");
system("pause");
fclose(fp);
exit(0);
}
struct messages student[100];
int i = read(fp, student);//i是学生人数 //读入
int j = 0, n = 0;
for(j=0; j<i-1; j++)
{
if(student[j].Agrade<60 || student[j].Agrade1<60 || student[j].Agrade2<60)
{
n++;
printf("---第%d位成绩不合格学生的相关信息---\n", n);
printf("学号:%s\n", student[j].StudentNum);
printf("姓名:%s\n", student[j].Sname);
if(student[j].Agrade<60)
{
printf("课程编号:%s\n", student[j].Course);
printf("课程名称:%s\n", student[j].Cname);
printf("总成绩:%0.2lf\n", student[j].Agrade);
}
if(student[j].Agrade1<60)
{
printf("课程编号:%s\n", student[j].Course1);
printf("课程名称:%s\n", student[j].Cname1);
printf("总成绩:%0.2lf\n", student[j].Agrade1);
}
if(student[j].Agrade2<60)
{
printf("课程编号:%s\n", student[j].Course2);
printf("课程名称:%s\n", student[j].Cname2);
printf("总成绩:%0.2lf\n", student[j].Agrade2);
}
printf("\n");
}
}
if(n==0)
printf("所有学生成绩均合格!\n");
system("pause");
}
//2系列函数-->优化
char key_wel()
{
int c;
system("mode con cols=90 lines=25");//改变窗口大小
color(14);
printf("\n\n\n\n\t\t=======================欢迎使用===========================\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t请选择操作:\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t 按键x:重置密码\t按键i:输入密码\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");;
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t||\t\t 按键[ESC]:退出\t\t\t||\n");
printf("\t\t||\t\t\t\t\t\t\t||\n");
printf("\t\t==========================================================\n");
while(1)
{
SetPosition(38,17);
printf("请选择:[_]");
SetPosition(46,17);
c = getch();
if(c=='x' || c=='i')
{
printf("%c",c);
break;
}
else if(c == 27)
{
SetPosition(38,18);
printf("确认退出?(Y/N)[_]");
SetPosition(53,18);
while(1)
{
char choice = getch();
if(choice == 'Y' || choice == 'y' || choice == 'n' || choice == 'N')
{
printf("%c", choice);
if(choice == 'Y' || choice == 'y')
{
SetPosition(38,20);
printf("欢迎您的下次使用,再见!");
sleep(1);
exit(0);
}
else
break;
}
else
{
printf("\n您的输入有误,请重试...");
SetPosition(53,18);
}
}
}
else
{
SetPosition(50,22);
printf("您的选择有误,请重试...");
SetPosition(46,17);
}
SetPosition(38,18);
printf(" ");
}
return c;
}
void keys()
{
char keys[7];//多一位放结束标志
char in_keys[7];
memset(in_keys, 0, sizeof(in_keys));
memset(keys, 0, sizeof(keys)); //初始化
int flag = 1;//表示输入的密码是否正确
for(;flag ;)
{
char c = key_wel();
switch(c)
{
case 'x':
{
SetPosition(40,19);
printf("您是否确认重置密码?(Y/N):[_]");
SetPosition(66,19);
while(1)
{
char c1 = getch();
if(c1=='y' || c1=='Y' || c1=='n' || c1=='N')
{
printf("%c", c1);
SetPosition(40,22);
printf(" ");
if(c1=='y' || c1=='Y')
{
SetPosition(40,20);
printf("请输入新的6位密码: ");
scanf("%s", keys);
flag = 0;
}
break;
}
else
{
SetPosition(40,22);
printf("您的选择有误,请重新输入...");
SetPosition(66,19);
}
}
FILE *fp = fopen("secret.txt", "w+");
if(fp == NULL)
{
printf("打开文件失败,请设置密码后再尝试!\n按任意键退出\n");
getch();
fclose(fp);
exit(0);
}
fprintf(fp, "%s\n", keys);
fclose(fp);
}
case 'i':
{
c = 'i';
char choice;
SetPosition(40,22);
printf(" ");
FILE *fp = fopen("secret.txt", "r");
if(fp == NULL)
{
SetPosition(40,22);
printf("未设置密码,请重试!");
SetPosition(40,23);
system("pause");
fclose(fp);
exit(0);
}
fscanf(fp, "%s\n", keys);
fclose(fp);
do
{
SetPosition(40,21);
printf("请输入您的密码([ESC]返回上一层): ");
int i = 0;
for(i=0; i<6; i++)
{
in_keys[i] = getch();
char ch = in_keys[i];
if(ch==27)
{
SetPosition(40,23);
printf("您确认返回上一层?(Y/N)[_]");
SetPosition(63,23);
while(1)
{
choice = getch();
if(choice == 'Y' || choice == 'y' || choice == 'n' || choice == 'N')
{
printf("%c", choice);
if(choice == 'Y' || choice == 'y')
c = 'x';
i = 6;
break;
}
else
printf("您的输入有误,请重试...");
}
}
else
printf("*");
if(i == 5)
getch();
}
if(c == 'i')
{
if(strcmp(keys, in_keys) == 0)
{
SetPosition(40,24);
printf("密码正确,请稍后...");
flag = 0;
sleep(1);
break;
}
SetPosition(40,22);
if(choice == 'n')
{
SetPosition(40,23);
printf(" ");
choice = '\0';
}
else
printf("密码错误,请重试...");
SetPosition(65,21);
printf(" ");
}
else
break;
}while(1);
break;
}
}
}
}
标签：fp,Afterstu,angle,管理系统,int,C语言,student,printf,成绩 From： https://www.cnblogs.com/yuooo/p/17366956.html