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++;}elseif ((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);}}elseif ((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;}elseif (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);elseout.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