成绩记录簿程序设计
1.具体要求：
制作一个系统制作一个系统实现对学生成绩的管理功能，可以对学生信息及成绩信息进行录入、修改、删除等。
2.基本功能：
（1）增加、修改、删除一个学生及成绩信息。
（2）显示学生成绩。
（3）按条件显示学生资料（条件有学号、姓名等）。
（4）按条件显示班级最高分数以及对应的学生姓名（条件有课程名）
（5）计算所有学生的平均成绩。
3. 有了整体设计这一框架，我们逐步进行设计
（1）设计界面
利用 cout 输出一些符号组合成界面，然后利用while循环主界面和switch、case语句进行对功能选择的实现，构成了主函数。
int main()
{
meau2();
int num =0 ;
while ( num != 9)
{
cout << " " << endl;
cout << " ●●●●●●●●●●●●●●●●●●●●●●●● " << endl;
cout << " $$ $$ " << endl;
cout << " $$ ****************************************** $$ " << endl;
cout << " $$ 学生成绩管理系统 $$ " << endl;
cout << " $$ ★1 成绩录入 ★ $$ " << endl;
cout << " $$ ★2 显示学生成绩信息 ★ $$ " << endl;
cout << " $$ ★3 输入您想查找的学生条件 ★ $$ " << endl;
cout << " $$ ★4 增加一个学生及成绩信息 ★ $$ " << endl;
cout << " $$ ★5 修改一个学生及成绩信息 ★ $$ " << endl;
cout << " $$ ★6 删除一个学生及成绩信息 ★ $$ " << endl;
cout << " $$ ★7 按条件进行成绩排序 ★ $$ " << endl;
cout << " $$ ★8 计算所有学生的平均成绩 ★ $$ " << endl;
cout << " $$ ★9 退出系统 ★ $$ " << endl;
cout << " $$ $$ " << endl;
cout << " $$ ****************************************** $$ " << endl;
cout << " ●●●●●●●●●●●●●●●●●●●●●●●● " << endl;
cout << " --------------------------------------------- " << endl;
cout << " 友情提示：在开始操作前，请先录入信息，按1进入 " << endl;
cout << " 行成绩的录入，然后进行操作(*^__^*)(*^__^*) " << endl;
system("color 0A");
student c;
cout << "请输入一个数字进行选择：" << endl;
cin >> num;
switch (num)
{
case 1: system("cls");
c.Newlist(); break;
case 2: system("cls");
c.xianshi(); break;
case 3: system("cls");
c.check(); break;
case 4: system("cls");
c.zengjia(); break;
case 5: system("cls");
c.xiugai(); break;
case 6: system("cls");
c.shanchu(); break;
case 7: system("cls");
c.paixu(); break;
case 8: system("cls");
c.pingjun(); break;
case 9: system("cls");
c.meau1(); break;
default: cout << "请选择序号：" << endl;
}
}
return 0;
}
（2）定义为一个学生类
class student { //定义一个学生类//
public:
//student(){}
student(double i = 0, string n = "#", int a = 0, int b = 0, int c = 0);
string name;
int num;
int zcj;
int sx;
int yy;
void Newlist();
void xianshi();
void zengjia();
void shanchu();
void xiugai();
void paixu();
void pingjun();
void check();
void meau1();
然后进行构造函数
//void meau2();
};
student::student(double i, string n, int a, int b, int c)
{
num = i;
name = n;
zcj = a;
sx = b;
yy = c;
}
（3）新建学生信息
//**************新建学生成绩信息**************//
void student::Newlist()
{
cout << "请输入学生人数";
cin >> n;
ofstream outfile("stu.dat", ios::out); //定义文件流对象，打开磁盘文件"stu.dat"
if (! outfile) //如果打开失败，outfile返回0值
{
cerr << "打开失败" << endl;
abort();
}
for (int i = 0; i < n; i )
{
cout << "请输入学生学号" << endl;
cin >> stu[i].num;
cout << "输入学生姓名" << endl;
cin >> stu[i].name;
cout << "输入数学成绩" << endl;
cin >> stu[i].sx;
cout << "输入英语成绩" << endl;
cin >> stu[i].yy;
stu[i].zcj = stu[i].sx stu[i].yy;
//cout<<"输入学生总成绩"<<endl;
//cin>>stu[i].zcj;
}
outfile.close(); //关闭磁盘文件
cout << "学生信息已经建立";
}
//*************显示成绩信息*************//
void student::xianshi()
{
int i;
cout << "所有学生的信息为:" << endl;
cout << "学号 姓名 数学成绩 英语成绩 总成绩 " << endl;
cout << "--------------------------------------------------------------------" << endl;
//ofstream outfile("stu.dat",ios::out); //定义文件流对象，打开磁盘文件"stu.dat"
//if(! outfile) //如果打开失败，outfile返回0值
//{
//cerr<<"打开失败"<<endl;
//abort();
//}
for (i = 0; i < n; i )
{
cout << stu[i].num << '\t' << ' ' << stu[i].name << '\t' << stu[i].sx << '\t' << stu[i].yy << '\t' << stu[i].zcj << endl;
}
}
(4)增加学生信息
//*************增加成绩信息*****************//
void student::zengjia()
{
cout << "请输入学生学号" << endl;
cin >> stu[n].num;
cout << "输入学生姓名" << endl;
cin >> stu[n].name;
cout << "输入数学成绩" << endl;
cin >> stu[n].sx;
cout << "输入英语成绩" << endl;
cin >> stu[n].yy;
stu[n].zcj = stu[n].yy stu[n].sx;
n ;
}
（5）删除学生信息
//****************删除成绩信息******************//
void student::shanchu()
{
int a, b, p;
cout << "请输入要删除学生的学号" << endl;
cin >> a;
for (int i = 0; i < n; i )
for (int j = 0; j < n; j ) //查找学生
{
if (stu[j].num == a)
{
b = 1;
p = j;
}
}
if (b == 1)
{
for (int i = p; i < n; i )
stu[i] = stu[i 1];
n--;
cout << "已删除此学生" << endl;
}
else cout << "没有此学生" << endl;
}
（6）修改学生信息
//****************修改成绩信息******************//
void student::xiugai()
{
int a, b, p;
cout << "请输入需要修改学生的学号" << endl;
cin >> a;
for (int j = 0; j < n; j )
{
if (stu[j].num == a)
{
b = 1;
p = j;
}
}
if (b == 1)
{
cout << "请输入新的学生学号" << endl;
cin >> stu[p].num;
cout << "输入学生姓名" << endl;
cin >> stu[p].name;
cout << "输入数学成绩" << endl;
cin >> stu[p].sx;
cout << "输入英语成绩" << endl;
cin >> stu[p].yy;
stu[p].zcj = stu[p].yy stu[p].sx;
cout << "已修改为此学生" << endl;
}
else cout << "没有此学生" << endl;
}
（7）课程成绩排序
//****************************课程成绩排序***************************//
void student::paixu()
{
int c, choice, m, j, k, p;
student temp;
cout << "***************请选择成绩统计课程 ***************" << endl;
cout << " ★1 数 学 ★ " << endl;
cout << " ★2 英 语 ★ " << endl;
cout << " ★3 总成绩 ★ " << endl;
cin >> c;
switch (c)
{
case 1: cout << "*******************************************" << endl;
cout << " ★1 降序排列★ " << endl;
cout << " ★2 升序排列★ " << endl; //数学成绩排序
cin >> choice;
if (choice == 2)
{
for (m = 0; m < n - 1; m ) //选择排序法
{
k = m;
for (j = m 1; j < n; j )
if (stu[j].sx < stu[k].sx) k = j;
if (k != m)
{
temp = stu[k];
stu[k] = stu[m];
stu[m] = temp;
}
}
}
else if (choice == 1)
{
for (m = 0; m < n - 1; m )
{
k = m;
for (j = m 1; j < n; j )
if (stu[j].sx > stu[k].sx) k = j;
if (k != m)
{
temp = stu[k];
stu[k] = stu[m];
stu[m] = temp;
}
}
}
cout << " 学生学号 姓名 数学成绩 " << endl;
for (p = 0; p < n; p )
cout << '\t' << stu[p].num << '\t' << stu[p].name << '\t' << '\t' << stu[p].sx << endl;
break;
case 2: cout << "*******************************************" << endl;
cout << " ★1 降序排列★ " << endl;
cout << " ★2 升序排列★ " << endl; //英语成绩排序
cin >> choice;
if (choice == 2)
{
for (m = 0; m < n - 1; m )
{
k = m;
for (j = m 1; j < n; j )
if (stu[j].yy < stu[k].yy) k = j;
if (k != m)
{
temp = stu[k];
stu[k] = stu[m];
stu[m] = temp;
}
}
}
else if (choice == 1)
{
for (m = 0; m < n - 1; m )
{
k = m;
for (j = m 1; j < n; j )
if (stu[j].yy > stu[k].yy) k = j;
if (k != m)
{
temp = stu[k];
stu[k] = stu[m];
stu[m] = temp;
}
}
}
cout << " 学生学号" << '\t' << "姓名" << '\t' << "总成绩" << endl;
for (p = 0; p < n; p )
cout << '\t' << stu[p].num << '\t' << stu[p].name << '\t' << stu[p].yy << endl;
break;
case 3: cout << "*******************************************" << endl;
cout << " ★1 降序排列★ " << endl;
cout << " ★2 升序排列★ " << endl;
//总成绩排序
cin >> choice;
if (choice == 2)
{
for (m = 0; m < n - 1; m )
{
k = m;
for (j = m 1; j < n; j )
if (stu[j].zcj < stu[k].zcj) k = j;
if (k != m)
{
temp = stu[k];
stu[k] = stu[m];
stu[m] = temp;
}
}
}
else if (choice == 1)
{
for (m = 0; m < n - 1; m )
{
k = m;
for (j = m 1; j < n; j )
if (stu[j].zcj > stu[k].zcj) k = j;
if (k != m)
{
temp = stu[k];
stu[k] = stu[m];
stu[m] = temp;
}
}
}
cout << " 学生学号" << '\t' << "姓名" << '\t' << "总成绩" << endl;
for (p = 0; p < n; p )
cout << '\t' << stu[p].num << '\t' << stu[p].name << '\t' << stu[p].zcj << endl;
}
}
（8）求平均成绩
//****************求平均成绩******************//
void student::pingjun()
{
float sum = 0;
float ave;
int i;
for (i = 0; i < n; i )
{
sum = stu[i].zcj;
}
ave = sum / n;
cout << "所有学生的平均成绩为：" << ave << endl;
}
（9）学生成绩查询
//*****************学生成绩查询********************//
void student::check()
{
void Check1();
void Check2();
int c;
cout << " ◤ ◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇ ◥ " << endl;
cout << " ☆ ☆ " << endl;
cout << " ☆ ***********请选择查询方式*********** ☆ " << endl;
cout << " ☆ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ☆ " << endl;
cout << " ☆ ● 1 按姓名查询 ☆ " << endl;
cout << " ☆ ● 2 按学号查询 ☆ " << endl;
cout << " ☆ ● 3 返回上一级 ☆ " << endl;
cout << " ☆ ☆ " << endl;
cout << " ◣ ◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇ ◢ " << endl;
cin >> c;
switch (c)
{
case 1: Check1(); break;
case 2: Check2(); break;
case 3: return;
default: cout << "请选择序号进行操作：" << endl;
}
}
void Check1() //按姓名查找
{
int b, p;
string a;
cout << "请输入要需要查找学生的姓名" << endl;
cin >> a;
for (int i = 0; i < n; i )
for (int j = 0; j < n; j )
{
if (stu[j].name == a)
{
b = 1;
p = j;
}
}
if (b == 1)
{
cout << "学号， 姓名， 数学， 英语， 总成绩" << endl;
cout << stu[p].num << '\t' << stu[p].name << '\t' << stu[p].sx << '\t' << stu[p].yy << '\t' << stu[p].zcj << endl;
}
else cout << "没有此学生" << endl;
}
void Check2() //按学号查找
{
int a, b, p;
cout << "请输入要需要查找学生的学号" << endl;
cin >> a;
for (int j = 0; j < n; j )
{
if (stu[j].num == a)
{
b = 1;
p = j;
}
}
if (b == 1)
{
cout << "学号， 姓名， 数学， 英语，总成绩" << endl;
cout << stu[p].num << '\t' << stu[p].name << '\t' << stu[p].sx << '\t' << stu[p].yy << '\t' << stu[p].zcj << endl;
}
else cout << "没有此学生" << endl;
}
（10）退出界面
void student::meau1()
{
cout << endl;
cout << " ▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽▽ " << endl;
cout << " △ △ " << endl;
cout << " △ △ " << endl;
cout << " △ ※ 感谢使用 ※ △ " << endl;
cout << " △ ' : ` △ " << endl;
cout << " △ .-----: △ " << endl;
cout << " △ .' `. △ " << endl;
cout << " △ , / (o) ` △ " << endl;
cout << " △ \\`._/ ,__) △ " << endl;
cout << " △ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ △ " << endl;
cout << " △ △ " << endl;
cout << " △△△△△△△△△△△△△△△△△△△△△△△△ " << endl;
}
（11）进入界面
void meau2()
{
cout << endl;
cout << endl;
cout << endl;
cout << endl;
cout << endl;
cout << endl;
cout << " △▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△ " << endl;
cout << " ◆ ◆ " << endl;
cout << " ◆ ◆ " << endl;
cout << " ◆ ◆ " << endl;
cout << " ◆ ★ 欢迎进入成绩管理系统 ★ ◆ " << endl;
cout << " ◆ ◆ " << endl;
cout << " ◆ ◆ " << endl;
cout << " ◆ ◆ " << endl;
cout << " △▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△▲△ " << endl;
srand((unsigned)time(NULL));
char stu[20] = {0};
int m = 0;
union utype
{
int i;
char ch;
float a;
} temp;
temp.i = 266;
printf("%d\n", temp.ch);
while (m != 10)
{
int a = rand() % 8;
system(stu);
Sleep(500);
m ;
}
}
