Student-Management-System/FileManager.cpp at main · gulaisha687-code/Student-Management-System · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
#include "FileManager.h"
#include <fstream>
#include <iostream>
#include <sstream>
#include <cstdio>
using namespace std;
 void FileManager::addStudent(Student student)
{
    ofstream file("students.txt", ios::app);

    if (!file)
    {
        cout << "Error opening file!" << endl;
        return;
    }

    file << student.getStudentID() << ","
         << student.getName() << ","
         << student.getAge() << ","
         << student.getDepartment() << ","
         << student.getSemester() << ","
         << student.getCGPA() << endl;

    file.close();

    cout << "Student saved successfully!" << endl;
}
void FileManager::displayStudents()
{
   ifstream file("students.txt");
   if (!file)
    {
        cout << "No student records found." << endl;
        return;
    }
    string line;
    cout << "\n========== Student Records ==========\n";
    while (getline(file, line))
    {
        cout << line << endl;
    }
    file.close();
}
void FileManager::searchStudent()
{
    ifstream file("students.txt");
    if (!file)
    {
        cout << "File not found!" << endl;
        return;
    }
    int searchID;
    cout << "Enter Student ID: ";
    cin >> searchID;
     string line;
    bool found = false;
        while(getline(file, line))
    {
        stringstream ss(line);
        string id,name,age,department,semester,cgpa;
        getline(ss,id,',');
        getline(ss,name,',');
        getline(ss,age,',');
        getline(ss,department,',');
        getline(ss,semester,',');
        getline(ss,cgpa,',');
        if(stoi(id)==searchID)
{
            cout << "\n========== Student Found ==========\n";
            cout << "Student ID : " << id << endl;
            cout << "Name       : " << name << endl;
            cout << "Age        : " << age << endl;
            cout << "Department : " << department << endl;
            cout << "Semester   : " << semester << endl;
            cout << "CGPA       : " << cgpa << endl;
            found = true;
            break;}}
            if(!found)
    {
        cout << "Student not found!" << endl;
    }

    file.close();
}
void FileManager::updateStudent()
{
    ifstream file("students.txt");
    ofstream temp("temp.txt");

    if(!file)
    {
        cout << "File not found!" << endl;
        return;
    }
    int searchID;
     cout << "Enter Student ID to Update: ";
     cin >> searchID;
     string line;
     bool found = false;
     while(getline(file, line))
{
    stringstream ss(line);
    string id,name,age,department,semester,cgpa;

    getline(ss,id,',');
    getline(ss,name,',');
    getline(ss,age,',');
    getline(ss,department,',');
    getline(ss,semester,',');
    getline(ss,cgpa,',');
    if(stoi(id)==searchID)
{
    found=true;
    cout<<"Enter New Name: ";

cin.ignore();
getline(cin,name);
cout<<"Enter Age: ";
getline(cin,age);
cout<<"Enter Department: ";
getline(cin,department);
cout<<"Enter Semester: ";
getline(cin,semester);
cout<<"Enter CGPA: ";
getline(cin,cgpa);

temp<<id<<","
    <<name<<","
    <<age<<","
    <<department<<","
    <<semester<<","
    <<cgpa<<endl;}
    else
{
    temp<<line<<endl;
}
}
file.close();

temp.close();
remove("students.txt");

rename("temp.txt","students.txt");
if(found)
{
    cout<<"Student Updated Successfully!"<<endl;
}
else
{
    cout<<"Student Not Found!"<<endl;
}
}
void FileManager::deleteStudent()
{
    ifstream file("students.txt");
    ofstream temp("temp.txt");

    if(!file)
    {
        cout<<"File not found!"<<endl;
        return;
    }
    int searchID;
    cout<<"Enter Student ID to Delete: ";
    cin>>searchID;
    string line;
    bool found=false;
    while(getline(file,line))
{
    stringstream ss(line);
    string id,name,age,department,semester,cgpa;
getline(ss,id,',');
getline(ss,name,',');
getline(ss,age,',');
getline(ss,department,',');
getline(ss,semester,',');
getline(ss,cgpa,',');
if(stoi(id)==searchID)
{
    found=true;

    continue;
}
temp << line << endl;
}

file.close();

temp.close();
remove("students.txt");

rename("temp.txt","students.txt");
if(found)
{
    cout<<"Student Deleted Successfully!"<<endl;
}
else
{
    cout<<"Student Not Found!"<<endl;
}

}