• 学生成绩管理系统?


    大一时候的C++/VC++课程设计,“学生成绩管理系统”。老师:“你这个管理系统有什么特点”。我:“这个系统可以动态的调整科目的数量,还能把成绩存储到文件里…”(当时我自己觉得好高大上,好牛逼啊)。

    那是一个初春,年后的日子,学期刚开始。寒冷的北方春天像北方的春天一样寒冷。我拿着厚厚的一沓传单,行走在某城的某街,麻木的往行人手中塞着单子。有一天下午,一个姑娘来找我借一块钱,说坐车没钱了,需要现金,加微信转给我。emmm借给她了,然后让她帮我分摊了几张传单。嗯,并没加好友。

    早出晚归的日子很快过去,这段代码也是那个时候写下的。白天兼职,晚上敲代码,拖着疲惫的身体到处溜达。

    // StudentScoreManage.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
    //
     
    // ceshi.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
    //
     
     
     
    #include 
    #include "process.h"
    #include 
    #include 
    #include 
    #include "stdio.h"
     
    #define clear() system("cls")
    #define foreground_bright() SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_INTENSITY)
    #define foreground_green() SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN)
    #define foreground_red()   SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_RED)
    #define foreground_blue()  SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_BLUE)
    #define foreground_white() SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE)
    #define background_bright() SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), BACKGROUND_INTENSITY)
    #define background_green() SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), BACKGROUND_GREEN)
    #define background_red()   SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), BACKGROUND_RED)
    #define background_blue()  SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), BACKGROUND_BLUE)
    #define background_black() SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), BACKGROUND_GREEN |  FOREGROUND_BLUE)
     
    using namespace std;
    int  NUMBER = 4;
    int open = 0;
     
     
     
    class Student_Score_Manage {
    private:
    	string* head = new string[NUMBER];
    	string* str = new string[NUMBER];
    	float* score = new float[NUMBER];
    	static int NUM;
    public:
    	void SET_HEAD(int n, string s) { *(head + n) = s; }
    	void SET_STR(int n, string s) { *(str + n) = s; }
    	void SET_SCORE(int n, float s) { *(score + n) = s; }
     
    	string GET_HEAD(int n) { return *(head + n); }
    	string GET_STR(int n) { return *(str + n); }
    	float  GET_SCORE(int n) { return *(score + n); }
     
    	static void set_num(int i) { NUM += i; }
    	static int get_num() { return NUM; }
    	Student_Score_Manage();
     
     
    	Student_Score_Manage(string[], string[], float[], int);
    	~Student_Score_Manage();
     
    	void display(Student_Score_Manage*, int);
    	void print_table_head(Student_Score_Manage*);
    	float get_one_sum(Student_Score_Manage*, int);
     
    };
    //初始化所有数据
    int Student_Score_Manage::NUM = 0;
    Student_Score_Manage::Student_Score_Manage()
    {
    	for (int i = 0; i < NUMBER; i++)
    	{
    		*(head + i) = "NULL";
    		*(str + i) = "NULL";
    		*(score + i) = 0;
    	}
    }
    Student_Score_Manage::Student_Score_Manage(string he[], string st[], float sc[], int n = 2)
    {
     
    	for (int i = 0; i < NUMBER; i++)
    		* (head + i) = he[i];
     
    	for (int j = 0; j < n; j++)
    	{
    		*(str + j) = st[j];
    	}
     
    	for (int k = n; k < NUMBER - n; k++)
    		* (score + k) = sc[k];
    }
    Student_Score_Manage::~Student_Score_Manage()
    {
    	delete[] head;
    	delete[] str;
    	delete[] score;
     
    }
    void Student_Score_Manage::display(Student_Score_Manage* s, int n = 2)//前n个为string,后NUMBER-n个为float
    {
    	for (int i = 0; i < NUMBER; i++)
    	{
     
    		if (i < n) cout << s->GET_STR(i) << "\t";
    		else
    		{
    			cout << s->GET_SCORE(i) << "\t";
    		}
    	}
    	cout << endl;
    }
    float Student_Score_Manage::get_one_sum(Student_Score_Manage* s, int n = 2)//从score[n]个加起
    {
    	float sum = 0;
    	for (int i = n; i < NUMBER; i++)
    		sum += s->GET_SCORE(i);// *(score + i);
    	return sum;
    }
    //打印所有学生成绩信息
    void Student_Score_Manage::print_table_head(Student_Score_Manage* s)
    {
    	foreground_green();
    	for (int i = 0; i < NUMBER; i++)
    		cout << s->GET_HEAD(i) << "\t";
    	cout << endl;
    	foreground_white();
    }
    void print_all(Student_Score_Manage* s, int n = 2)
    {
    	//foreground_green();
    	//background_black();
    	cout << "编号\t";
    	//foreground_white();
    	s->print_table_head(s);
     
     
    	for (int i = 0; i < s->get_num(); i++)
    	{
    		cout.width(8);
    		cout.setf(ios::left);
    		foreground_blue();
    		cout << (i + 1);
    		foreground_white();
    		(s + i)->display(s + i, n);
    	}
    	cout.unsetf(ios::left);
    }
     
    void swap(Student_Score_Manage* m, Student_Score_Manage* n)
    {
    	Student_Score_Manage* p = new Student_Score_Manage;
     
     
    	for (int i = 0; i < NUMBER; i++)
    	{
     
    		p->SET_HEAD(i, (m->GET_HEAD(i)));
    		p->SET_STR(i, (m->GET_STR(i)));
    		p->SET_SCORE(i, (m->GET_SCORE(i)));
     
    		m->SET_HEAD(i, (n->GET_HEAD(i)));
    		m->SET_STR(i, (n->GET_STR(i)));
    		m->SET_SCORE(i, (n->GET_SCORE(i)));
     
    		n->SET_HEAD(i, (p->GET_HEAD(i)));
    		n->SET_STR(i, (p->GET_STR(i)));
    		n->SET_SCORE(i, (p->GET_SCORE(i)));
    	}
    	delete p;
    }
    void sort(Student_Score_Manage* s, int j, int ud = 0)//j为第几科目从0开始
    {
     
    	int i = s->get_num();
     
    	for (int h = 0; h < i - 1; h++)
    	{
    		for (int n = h + 1; n < i; n++)
    		{
     
    			switch (ud)
    			{
    			case 0:
    				if ((s + h)->GET_STR(j) < (s + n)->GET_STR(j) || (s + h)->GET_SCORE(j) < (s + n)->GET_SCORE(j))
    					swap((s + h), (s + n));
    				break;
     
    			case 1:
    				if ((s + h)->GET_STR(j) > (s + n)->GET_STR(j) || (s + h)->GET_SCORE(j) > (s + n)->GET_SCORE(j))
    					swap((s + h), (s + n));
    				break;
     
    			default:break;
    			}
    		}
    	}
    }
    void Main_page(Student_Score_Manage* s, string head[], int n)
    {
    	void A_page(Student_Score_Manage * s, string str[], int n = 2);
    	void B_page(Student_Score_Manage * s, string str[], int n = 2);
    	void C_page(Student_Score_Manage * s, string str[], int n = 2);
    	int  D_page(Student_Score_Manage * s, string str[], int n = 2);
    	void E_page(Student_Score_Manage * s, string str[], int n = 2);
    	void Q_page(Student_Score_Manage * s, int n);
     
     
    	cout << "\t\t\t\t请   选   择   系   统   功   能   项:\n"
    		<< "\t\t\t\t\t\ta、成绩录入\n"
    		<< "\t\t\t\t\t\tb、成绩显示\n"
    		<< "\t\t\t\t\t\tc、成绩排序\n"
    		<< "\t\t\t\t\t\td、成绩修改\n"
    		<< "\t\t\t\t\t\te、成绩统计\n"
    		<< "\t\t\t\t\t\tq、退出系统\n" << endl;
    	cout << endl << endl;
    	cout << "请选择编号(a,b,c,d,e,q)后按 ENTER:" << endl;
    	switch (getchar())
    	{
    	case 'a':A_page(s, head, n); break;
    	case 'b':B_page(s, head, n); break;
    	case 'c':C_page(s, head, n); break;
    	case 'd':
    		if (D_page(s, head, n) != 0)
    		{
    			cout << "系统内暂无数据,请先录入或导入数据!\n" << endl;
    			cout << "按任意键返回主界面。" << endl;
    			system("pause>nul");
    			Main_page(s, head, n);
    		}
    		break;
    	case 'e':E_page(s, head, n); break;
    	case 'q':Q_page(s, n);
    	default:clear(); Main_page(s, head, n);
    	}
    }
    int Read_line()
    {
    	int number = 0;
    	ifstream in("SCORE.txt", ios::in);
    	char c;
    	while (in.get(c))
    	{
    		if (c == '\n')
    			number++;
    	}
     
    	in.close();
    	return number;
    }
    void back(Student_Score_Manage* s, string head[], int n)
    {
    	if (s->get_num() == 0)
    	{
    		clear();
    		cout << "无任何数据,请先录入或导入数据,再执行此操作!!!" << endl;
    		system("echo 按任意键返回主界面。&pause>nul");
    		Main_page(s, head, n);
    	}
    }
     
    void A_page(Student_Score_Manage* s, string str[], int n = 2)
    {
    	void Read(Student_Score_Manage * s, int n);
    	if (open == 0)
    	{
    		if (Read_line() > 0)
    		{
    			cout << "发现文件中有" << Read_line() << "条记录,是否从文件中导入数据?( Y \\ N )" << endl;
    			getchar();
    			if (getchar() == 'Y')
    			{
     
    				Read(s, n);
    				for (int i = 0; i < s->get_num(); i++)
    					for (int j = 0; j < NUMBER; j++)
    						(s + i)->SET_HEAD(j, *(str + j));
    				system("echo 导入成功!&echo 按任意键返回主界面 & pause>null");
    				open = 1;
    				Main_page(s, str, n);
    			}
    		}
    	}
     
    	cout << "在行首输入quit结束录入,按Tab键隔开数据:\n";
    	s->print_table_head(s);
     
    	string* strl = new string[n];
    	float* scorel = new float[NUMBER];
    	while (1)
    	{
     
    		//cout << "全局个数:" << s->get_num() << endl;
    		cin >> *strl;
     
    		if (*strl == "quit" || *strl == "QUIT") {
    			system("pause");
    			break;
    		}
     
    		(s + s->get_num())->SET_STR(0, *strl);
    		for (int k = 0; k < NUMBER; k++)
    			(s + s->get_num())->SET_HEAD(k, str[k]);
     
    		for (int i = 1; i < NUMBER; i++)
    		{
    			if (i < n)
    			{
    				cin >> *(strl + i);
    				(s + s->get_num())->SET_STR(i, *(strl + i));
    			}
    			else
    			{
    				cin >> *(scorel + i);
    				(s + s->get_num())->SET_SCORE(i, *(scorel + i));
    			}
    		}
     
    		s->set_num(1);
     
    	}
    	delete[] strl;  delete[] scorel;
    	Main_page(s, str, n);
    }
    void B_page(Student_Score_Manage* s, string head[], int n = 2)
    {
    	back(s, head, n);
     
    	clear();
     
    	cout << "\t\t\t全部信息:\n" << endl;
    	print_all(s, n);
    	system("echo 按任意键返回主界面 & pause>nul");
    	Main_page(s, head, n);
    }
    void C_page(Student_Score_Manage* s, string head[], int n = 2)
    {
    	back(s, head, n);
     
    	for (int i = 0; i < NUMBER; i++)
    		cout << i + 1 << "." << s->GET_HEAD(i) << "\t";
    	cout << endl << "选择要排序的字段:" << endl;
     
    	int w;
    	while (cin >> w && (w<1 || w>NUMBER));
    	int t;
    	cout << "请选择升降序: 0,降序   1,升序\n请选择:" << endl;
    	while (cin >> t && (t > 1 || t < 0));
    	sort(s, w - 1, t);
     
    	cout << "排序完毕!" << endl;
    	system("echo 按任意键返回主界面。& pause>nul");
     
    	Main_page(s, head, n);
    }
    int  D_page(Student_Score_Manage* s, string head[], int n = 2)
    {
    	back(s, head, n);
     
    	if (s->get_num() == 0) return -1;
    	cout << "\t\t\t\t\t\t程序修改:\n";
     
    	print_all(s, n);
    	cout << "请选择要修改的数据 '编号',然后按ENTER键\n" << endl;
    	int num; cin >> num;
    	if (num > (s->get_num()) || num <= 0) {
    		clear();
    		system("echo 编号超出范围,按任意键重新输入。pause>nul");
    		D_page(s, head, n);
    	}
     
    	clear();
    	cout << "请选择字段前编号以修改字段对应内容。" << endl;
    	for (int i = 0; i < NUMBER; i++)
    		cout << i + 1 << "." << s->GET_HEAD(i) << "\t";
    	cout << endl;
     
    	int m;
    	while (cin >> m && (m > NUMBER || m <= 0));
    	clear();
    	cout << "请输入新值:" << endl;
    	string stl; float scl;
     
    	if (m < n)
    	{
    		cin >> stl; (s + num - 1)->SET_STR(m - 1, stl);
    		cout << (s->GET_HEAD(m - 1)) << "修改成功!" << endl;
    	}
    	else
    	{
    		cin >> scl;  (s + num - 1)->SET_SCORE(m - 1, scl);
    		cout << (s->GET_HEAD(m - 1)) << "修改成功!" << endl;
    	}
     
    	system("echo 按任意键返回主界面。 & pause>nul");
    	Main_page(s, head, n);
    	return 0;
    }
     
    float get_average(Student_Score_Manage* s, int n)
    {
    	float sum = 0;
    	for (int i = 0; i < (s->get_num()); i++)
    		sum += (s + i)->GET_SCORE(n);
    	return (sum / (float)(s->get_num()));
    }
    int get_gl_average_number(Student_Score_Manage* s, int n, int ud = 0)//n为第几科,ud为升降序
    {
    	int num = 0;
    	float average = get_average(s, n);
    	for (int i = 0; i < s->get_num(); i++)
    	{
    		if (ud == 0)
    		{
    			if ((s + i)->GET_SCORE(n) > average) num++;
    		}
    		else
    			if ((s + i)->GET_SCORE(n) < average) num++;
    	}
     
    	return num;
    }
    Student_Score_Manage* find(Student_Score_Manage* s, string str/*int y*/, int n)//n为字段
    {
    	int i;
    	for (i = 0; i < s->get_num(); i++)
    		if ((s + i)->GET_STR(n) == str)
    			break;
     
    	if (i < s->get_num())
    		return (s + i);
     
    	return NULL;
    }
    string get_most(Student_Score_Manage* s, int n, int y = 0) //n第几科,y为最大最小
    {
     
     
    	float most = s->GET_SCORE(n);
    	string most_user = s->GET_STR(0);
    	for (int i = 1; i < s->get_num(); i++)
    	{
    		if (y == 0)
    		{
    			if ((s + i)->GET_SCORE(n) > most)
    			{
    				most = (s + i)->GET_SCORE(n);
    				most_user = (s + i)->GET_STR(0);
    			}
    		}
    		else
    			if ((s + i)->GET_SCORE(n) < most)
    			{
    				most = (s + i)->GET_SCORE(n);
    				most_user = (s + i)->GET_STR(0);
    			}
    	}
    	return most_user;
     
    }
    void fun_E_1(Student_Score_Manage* s, int n)
    {
    	clear();
    	int y = 0;
    	string b[2] = { "高","低" };
    	print_all(s);
    	cout << endl << endl;
    	cout << "请选择:0,查找显示最高分             1,查找显示最低分" << endl;
     
     
    	while (cin >> y && (y > 1 || y < 0));
    	cout << endl << endl << endl;
     
    	for (int i = n; i < NUMBER; i++)
    	{
    		cout << s->GET_HEAD(i) << "最" << b[y] << "分:\t" << find(s, get_most(s, i, y), 0)->GET_SCORE(i) << endl;
    		s->print_table_head(s);
    		find(s, get_most(s, i, y), 0)->display(find(s, get_most(s, i, y), 0));
    		cout << endl;
    	}
     
    }
    void fun_E_2(Student_Score_Manage* s, int n) {
     
    	clear();
    	print_all(s);
     
    	cout << endl << endl << endl;
    	cout << "\t\t\t\t\t各科平均成绩:" << endl;
    	cout << "科  目:\t";
    	for (int i = n; i < NUMBER; i++)
    		cout << s->GET_HEAD(i) << "\t";
    	cout << endl;
     
    	cout << "平均分:\t\t";
    	for (int j = n; j < NUMBER; j++)
     
    		cout << get_average(s, j) << "\t";
     
     
    	cout << endl;
     
    }
    void fun_E_3(Student_Score_Manage* s, int n)
    {
    	clear();
    	int y;
    	cout << "0,高于平均分      1,低于平均分\n请选择:" << endl;
    	string st[2] = { "高于平均分","低于平均分" };
    	while (cin >> y && (y > 1 || y < 0));
     
    	print_all(s, n);
    	cout << endl;
    	fun_E_2(s, n);
    	cout << endl;
     
    	for (int k = n; k < NUMBER; k++)
    		cout << s->GET_HEAD(k) << "  :" << st[y] << get_gl_average_number(s, k, y) << endl;
     
    }
    void E_page(Student_Score_Manage* s, string head[], int n)
    {
    	back(s, head, n);
    	cout << "\t\t\t\t\t\t\t成绩统计\n"
    		<< "\t\t\t\n请选择:\n"
    		<< "1.显示每门课程成绩最高的学生的基本信息\n"
    		<< "2.显示每门课程的平均成绩\n"
    		<< "3.显示超过某门课程平均成绩的学生人数"
    		<< endl;
    	int w;
    	while (cin >> w && (w > 3 || w < 1));
    	switch (w)
    	{
    	case 1:
     
    		fun_E_1(s, n);
    		cout << endl;
    		system("echo 按任意键返回主界面。& pause>nul");
    		Main_page(s, head, n);
     
    		break;
    	case 2:
     
    		fun_E_2(s, n);
    		cout << endl;
    		system("echo 按任意键返回主界面。& pause>nul");
    		Main_page(s, head, n);
     
    	case 3:
    		fun_E_3(s, n);
    		cout << endl;
    		system("echo 按任意键返回主界面。& pause>nul");
    		Main_page(s, head, n);
    		break;
    	default:
    		clear();
    		Main_page(s, head, n);
    	}
    }
    void Q_page(Student_Score_Manage* s, int n)
    {
    	void Write(Student_Score_Manage * s, int n, int h);
     
    	clear();
     
    	cout << "\t\t\t\t\t\t数据保存" << endl << endl << endl;
    	cout << "1,追加在原有数据之后保存\n" << endl
    		<< "2,清空之前内容之后保存数据\n" << endl
    		<< "3, 清空之前所有数据并不保存此次操作的数据\n" << endl
    		<< "4, 不保存任何数据" << endl << endl;
    	cout << "请选择:" << endl;
    	int a;
    	while (cin >> a && (a > 4 || a < 1));
    	if (a == 1 || a == 2)
    	{
    		Write(s, n, a);
    		cout << "\t\t\t\t\t\t数据保存成功!" << endl;
    	}
    	else
    		if (a == 3)
    		{
    			ofstream file("SCORE.txt", ios::out | ios::trunc);
    			file.close();
    		}
     
    	delete[]s;
    	clear();
    	for (int h = 5; h >= 1; h--)
    	{
    		cout << '\a' << endl;
    		cout << "谢谢使用!!!\n\t\t\t\t\t 再见!!!\n\n\n\n\n\n\n\n\n\t" << h << "秒后程序自动退出。" << endl;
    		Sleep(999);
    		clear();
    	}
     
    	exit(1);
    }
     
    void Read(Student_Score_Manage* s, int n)
    {
    	ofstream out("SCORE.txt", ios::out | ios::app);
    	out.close();
    	ifstream in("SCORE.txt", ios::in);
    	while (!in.eof())
    	{
     
    		string str;
    		float scor;
     
    		for (int i = 0; i < n; i++)
    		{
     
    			in >> str;
    			if (str == "") break;
    			(s + s->get_num())->SET_STR(i, str);
    		}
    		if (str == "") break;
    		for (int i = n; i < NUMBER; i++)
    		{
     
    			in >> scor;
    			(s + s->get_num())->SET_SCORE(i, scor);
    		}
    		s->set_num(1);
    	}
    	//s->set_num(-1);
    	in.close();
    }
    void Write(Student_Score_Manage* s, int n, int h)
    {
    	if (s->get_num() > 0)
    	{
    		ofstream out;
    		if (h == 0)
    			out.open("SCORE.txt", ios::out | ios::trunc);
    		else
    			out.open("SCORE.txt", ios::out | ios::app);
     
    		for (int k = 0; k < (s->get_num()); k++)
    		{
     
     
    			for (int i = 0; i < n; i++)
    				out << ((s + k)->GET_STR(i)) << "\t";
    			for (int i = n; i < NUMBER; i++)
    				out << ((s + k)->GET_SCORE(i)) << "\t";
    			out << endl;
     
    		}
     
    		out.close();
    	}
    }
     
    int main()
    {
    	NUMBER = 4;
    	string* str = new string[NUMBER];
    	*str = "学号";
    	*(str + 1) = "姓名";
    	*(str + 2) = "数学";
    	*(str + 3) = "语文";
     
    	//*(str + 4) = "英语";
    	//system("color 0a"); 
    	int many;
    	cout << "请输入学生人数!尽量大一些\n:" << endl;
    	cin >> many;
    	Student_Score_Manage* s = new Student_Score_Manage[many];
    	for (int i = 0; i < NUMBER; i++)
    		(s + 0)->SET_HEAD(i, *(str + i));
    	Main_page(s, str, 2);
    	return 0;
    }
     
    // 运行程序: Ctrl + F5 或调试 >“开始执行(不调试)”菜单
    // 调试程序: F5 或调试 >“开始调试”菜单
     
    // 入门使用技巧: 
    //   1. 使用解决方案资源管理器窗口添加/管理文件
    //   2. 使用团队资源管理器窗口连接到源代码管理
    //   3. 使用输出窗口查看生成输出和其他消息
    //   4. 使用错误列表窗口查看错误
    //   5. 转到“项目”>“添加新项”以创建新的代码文件,或转到“项目”>“添加现有项”以将现有代码文件添加到项目
    //   6. 将来,若要再次打开此项目,请转到“文件”>“打开”>“项目”并选择 .sln 文件
    
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  • 原文地址:https://blog.csdn.net/dawnto/article/details/128123004