add code

Administrator.cpp

@@ -0,0 +1,193 @@
+// Copyright (c) 2023 Xi Xu
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "Administrator.h"
+#include <iostream>
+#include <fstream>
+#include <iomanip>
+#include <algorithm>
+#include <cstring>
+
+int Administrator::maxno = 0;
+
+Student Administrator::getstu(int i)
+{
+    return stu[i];
+}
+
+int Administrator::getmaxno()
+{
+    maxno++;
+    return maxno;
+}
+
+int Administrator::add(char *i_name, bool i_gender, int i_age, char *i_major, int i_cls, double i_score)
+{
+    Student temp(getmaxno(), i_name, i_gender, i_age, i_major, i_cls, i_score);
+    stu.push_back(temp);
+    return maxno;
+}
+
+int Administrator::find(int i_no)
+{
+    for (int i = 0; i < stu.size(); i++)
+        if (stu[i].getno() == i_no)
+            return i;
+    return -1;
+}
+
+int Administrator::find(char *i_name)
+{
+    for (int i = 0; i < stu.size(); i++)
+        if (strcmp(stu[i].getname(), i_name) == 0)
+            return i;
+    return -1;
+}
+
+std::vector<int> Administrator::findbycls(char *i_major, int i_cls)
+{
+    std::vector<int> tmp;
+    for (int i = 0; i < stu.size(); i++)
+        if (strcmp(stu[i].getmajor(), i_major) == 0 && stu[i].getcls() == i_cls)
+            tmp.push_back(i);
+    return tmp;
+}
+
+bool Administrator::erase(int i_no)
+{
+    int i = find(i_no);
+    if (i == -1)
+        return false;
+    else
+    {
+        stu.erase(stu.begin() + i);
+        return true;
+    }
+}
+
+bool Administrator::erase(char *i_name)
+{
+    int i = find(i_name);
+    if (i == -1)
+        return false;
+    else
+    {
+        stu.erase(stu.begin() + i);
+        return true;
+    }
+}
+
+bool Administrator::edit(int i_no, char *i_name, bool i_gender, int i_age, char *i_major, int i_cls, double i_score)
+{
+    int i = find(i_no);
+    if (i == -1)
+        return false;
+    else
+    {
+        stu[i].setname(i_name);
+        stu[i].setgender(i_gender);
+        stu[i].setage(i_age);
+        stu[i].setmajor(i_major);
+        stu[i].setcls(i_cls);
+        stu[i].setscore(i_score);
+        return true;
+    }
+}
+
+void Administrator::display()
+{
+    if (!stu.empty())
+    {
+        std::cout << " No.            Name  Gender  Age           Major  Class  Score" << std::endl;
+        for (Student s : stu)
+        {
+            std::cout << s << std::endl;
+        }
+    }
+    else
+        std::cout << "No information exists!" << std::endl;
+}
+
+struct ascende
+{
+    bool operator()(const Student &__x, const Student &__y) const
+    {
+        return __x.getscore() - __y.getscore() < 0;
+    }
+};
+
+struct descende
+{
+    bool operator()(const Student &__x, const Student &__y) const
+    {
+        return __x.getscore() - __y.getscore() > 0;
+    }
+};
+
+void Administrator::sequence(bool ascending)
+{
+    if (ascending)
+        sort(stu.begin(), stu.end(), ascende());
+    else
+        sort(stu.begin(), stu.end(), descende());
+}
+
+double Administrator::average()
+{
+    double tmp = 0.0;
+    for (Student s : stu)
+        tmp += s.getscore();
+    tmp /= stu.size();
+    return tmp;
+}
+
+void Administrator::loadfile()
+{
+    std::ifstream in("Student_Information.txt");
+    if (!in)
+    {
+        std::cout << "Unable to open the file \"Student_Information.txt\"!" << std::endl;
+        return;
+    }
+    Student s;
+    int no;
+    char name[MAXN];
+    char gender[MAXN];
+    int age;
+    char major[MAXN];
+    int cls;
+    double score;
+    while (in >> no >> name >> gender >> age >> major >> cls >> score)
+    {
+        s.setno(no);
+        s.setname(name);
+        if (strcmp(gender, "male") == 0)
+            s.setgender(true);
+        else if (strcmp(gender, "female") == 0)
+            s.setgender(false);
+        s.setage(age);
+        s.setmajor(major);
+        s.setcls(cls);
+        s.setscore(score);
+        stu.push_back(s);
+    };
+    in.close();
+    for (Student s : stu)
+        if (s.getno() > maxno)
+            maxno = s.getno();
+}
+
+void Administrator::writefile()
+{
+    std::ofstream out("Student_Information.txt");
+    for (Student s : stu)
+    {
+        out << std::setw(4) << s.getno() << std::setw(16) << s.getname();
+        if (s.getgender())
+            out << "    male";
+        else
+            out << "  female";
+        out << std::setw(5) << s.getage() << std::setw(16) << s.getmajor() << std::setw(7) << s.getcls() << std::setw(7) << s.getscore() << std::endl;
+    }
+    out.close();
+}