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#include<iostream>
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#include<fstream>
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#include"xianzhi.h"
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using namespace xiaozu;
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using namespace std;
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#define MAX 100//先定义一个最大值，便于改动人数的时候直接改变
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#define max 150//定义考试成绩的最高分
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struct Student
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{
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int m_num;
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string m_name;
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int m_score;
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};
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struct Studentbooks
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{
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struct Student StudentArray[MAX];
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int m_size;
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};
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void show_Menu();//展示操作的菜单栏
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void addstudent(Studentbooks* sbs)//添加学生信息
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{
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if (sbs->m_size == MAX)
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{
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cout << "当前信息系统已满！" << endl;
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return;
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}
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else
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{
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//编号
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cout << "请输入学生编号：";
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int num = 0;
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cin >> num;
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sbs->StudentArray[sbs->m_size].m_num = num;
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//姓名
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string name;
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cout << "请输入学生姓名：";
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cin >> name;
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sbs->StudentArray[sbs->m_size].m_name = name;
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//成绩
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cout << "请输入学生的成绩：";
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int score{ get_line(0,max) };
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sbs->StudentArray[sbs->m_size].m_score = score;
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//更新信息系统数据统计
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sbs->m_size++;
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cout << "添加成功！" << endl;
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system("pause");
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system("cls");
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}
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}
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void showstudent(Studentbooks* sbs)//显示学生信息
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{
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if (sbs->m_size == 0)
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{
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cout << "当前信息系统为空！" << endl;
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}
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else
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{
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//输出每个学生的编号，姓名和成绩
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double highest{ 0 }, lowest{ 10000 }, average{ 0 }, fangcha{ 0 };
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for (int i = 0; i < sbs->m_size; i++)
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{
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cout << "学生编号：" << sbs->StudentArray[i].m_num<< endl;
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cout << "学生姓名：" << sbs->StudentArray[i].m_name << endl;
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cout << "学生成绩：" << sbs->StudentArray[i].m_score << endl;
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cout << endl;
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average += sbs->StudentArray[i].m_score;
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highest= highest > sbs->StudentArray[i].m_score ? highest : sbs->StudentArray[i].m_score;
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lowest= lowest < sbs->StudentArray[i].m_score ? lowest : sbs->StudentArray[i].m_score;
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}
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average = average / sbs->m_size;
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for (int i = 0; i < sbs->m_size; i++)
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{
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fangcha += (sbs->StudentArray[i].m_score - average) * (sbs->StudentArray[i].m_score - average);
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}
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//输出平均分，最高分，最低分,方差
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cout << "平均分：" << average << "\n";
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cout << "最高分：" << highest << "\n";
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cout << "最低分：" << lowest << "\n";
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cout << "方差：" << fangcha << "\n";
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cout << "成绩范围：" << lowest << "——" << highest << "\n";
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}
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system("pause");
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system("cls");
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}
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int isExist1(Studentbooks* sbs, int num)//删除学生信息（检测）
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{
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for (int i = 0; i < sbs->m_size; i++)
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{
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if (sbs->StudentArray[i].m_num == num)
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{
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return i;
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}
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}
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return -1;
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}
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int isExist2(Studentbooks* sbs, string name)//删除学生信息（检测）
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{
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for (int i = 0; i < sbs->m_size; i++)
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{
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if (sbs->StudentArray[i].m_name == name)
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{
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return i;
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}
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}
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return -1;
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}
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void deletestudent(Studentbooks* sbs)
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{
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int ret = 0;
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cout << "0：编号删除" << endl;
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cout << "1：姓名删除" << endl;
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int choice{ get_line(0,1) };
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if (choice == 0)
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{
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int num = 0;
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cout << "请输入要删除的学生编号：" << endl;
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cin >> num;
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ret = isExist1(sbs, num);
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}
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if (choice == 1)
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{
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string name;
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cout << "请输入要删除的学生姓名：" << endl;
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cin >> name;
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ret = isExist2(sbs, name);
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}
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if (ret != -1)
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{
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for (int i = ret; i < sbs->m_size; i++)
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{
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//数据前移
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sbs->StudentArray[i] = sbs->StudentArray[i + 1];
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}
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sbs->m_size--;
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cout << "删除成功" << endl;
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}
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else
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{
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cout << "查无此人" << endl;
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}
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system("pause");
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system("cls");
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}
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void findstudent(Studentbooks* sbs)
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{
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int ret = 0;
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cout << "0：编号查找" << endl;
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cout << "1：姓名查找" << endl;
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int choice{ get_line(0,1) };
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if (choice == 0)
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{
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int num = 0;
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cout << "请输入要查找的学生编号：" << endl;
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cin >> num;
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ret = isExist1(sbs, num);
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}
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if (choice == 1)
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{
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string name;
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cout << "请输入要查找的学生姓名：" << endl;
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cin >> name;
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ret = isExist2(sbs, name);
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}
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if (ret != -1)
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{
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cout <<"学生编号：" << sbs->StudentArray[ret].m_num << endl;
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cout <<"学生姓名：" << sbs->StudentArray[ret].m_name << endl;
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cout <<"学生成绩：" << sbs->StudentArray[ret].m_score << endl;
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}
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else
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{
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cout << "查无此人！" << endl;
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}
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system("pause");
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system("cls");
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}
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void modifystudent(Studentbooks* sbs)
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{
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int ret = 0;
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cout << "0：编号修改" << endl;
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cout << "1：姓名修改" << endl;
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int choice{ get_line(0,1) };
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if (choice == 0)
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{
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int num = 0;
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cout << "请输入要修改的学生编号：" << endl;
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cin >> num;
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ret = isExist1(sbs, num);
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}
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if (choice == 1)
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{
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string name;
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cout << "请输入要修改的学生姓名：" << endl;
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cin >> name;
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ret = isExist2(sbs, name);
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}
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if (ret != -1)
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{
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//编号
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cout << "请输入学生编号：";
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int num = 0;
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cin >> num;
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sbs->StudentArray[ret].m_num = num;
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//姓名
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string name;
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cout << "请输入学生姓名：";
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cin >> name;
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sbs->StudentArray[ret].m_name = name;
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//成绩
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cout << "请输入学生的成绩：";
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int score{ get_line(0,max) };
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sbs->StudentArray[ret].m_score = score;
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cout << "修改成功！！" << endl;
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}
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else
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{
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cout << "查无此人！" << endl;
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}
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system("pause");
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system("cls");
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}
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void clearstudent(Studentbooks* sbs)
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{
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sbs->m_size = 0;
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cout << "清空成功！" << endl;
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system("pause");
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system("cls");
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}
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int main()
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{
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struct Studentbooks sbs;
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sbs.m_size = 0;
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ifstream ifile;
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ifile.open("Information Manager System.txt", ios::in);
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if (ifile.is_open())
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{
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cout<<"是否读取文件？" << "\n" << "0:是" << "\n" << "1:否" << "\n";
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cout << "请输入：";
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int isread{ get_line(0,1) };
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if (!isread)
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{
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while (ifile >> sbs.StudentArray[sbs.m_size].m_num && ifile >> sbs.StudentArray[sbs.m_size].m_name && ifile >> sbs.StudentArray[sbs.m_size].m_score)
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sbs.m_size++;
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}
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}
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else
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{
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cout << "无现有文件！" << endl;
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system("pause");
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system("cls");
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}
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ifile.close();
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ofstream ofile;
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ofile.open("Information Manager System.txt", ios::trunc);
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while (1)
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{
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system("cls");
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show_Menu();
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int select(get_line(0, 6));
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switch (select)
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{
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case 1://添加学生
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addstudent(&sbs);
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break;
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case 2://显示学生（包括成绩以及最高分，平均分，最低分，方差）
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showstudent(&sbs);
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break;
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case 3://删除学生
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deletestudent(&sbs);
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break;
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case 4://查找学生
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findstudent(&sbs);
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break;
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case 5://修改学生
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modifystudent(&sbs);
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break;
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case 6:
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clearstudent(&sbs);
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break;
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case 0://退出系统
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for (int i{ 0 }; i < sbs.m_size; i++)
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{
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ofile << sbs.StudentArray[i].m_num << " ";
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ofile << sbs.StudentArray[i].m_name << " ";
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ofile << sbs.StudentArray[i].m_score << " ";
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ofile << "\n";
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}
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ofile.close();
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cout << "欢迎下次使用" << endl;
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system("pause");
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return 0;
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default:
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break;
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}
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}
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system("pause");
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return 0;
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}
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void show_Menu()
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{
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cout << "************************" << endl;
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cout << "****** 1.添加学生 ******" << endl;
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cout << "****** 2.显示学生 ******" << endl;
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cout << "****** 3.删除学生 ******" << endl;
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cout << "****** 4.查找学生 ******" << endl;
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cout << "****** 5.修改学生 ******" << endl;
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cout << "****** 6.清空学生 ******" << endl;
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cout << "****** 0.退出系统 ******" << endl;
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cout << "************************" << endl;
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} |
