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#include<iostream>
#include<fstream>
#include<string>
using namespace std;
void insert()
{
ofstream file;
file.open("file.txt", ios::app);
string name, semester;
int id;
double gpa;
cout << "\nEnter Student Id : ";
cin >> id;
cout << "\nEnter The Student Name : ";
cin.ignore();
getline(cin, name);
cout << "\nEnter The Student Semester : ";
cin >> semester;
cout << "\nEnter The Student Gpa : ";
cin >> gpa;
file << id << endl;
file << name << endl;
file << semester << endl;
file << gpa << endl;
}
void display()
{
bool check = true;
ifstream file;
file.open("file.txt");
string name, semester;
int id, findid;
double gpa;
if (file.fail())
{
cerr << "File Not Created or File Name is Not Valid";
}
else
{
cout << "\nEnter The Id : ";
cin >> findid;
while (file >> id&&cin.ignore(40), getline(file, name) && file >> semester , file >> gpa)
{
if (id == findid)
{
cout << name << endl;
cout << id;
cout << semester << endl;
cout << gpa << endl;
check = false;
}
}
file.clear();
file.seekg(0, ios::beg);
}
if (check == true)
cout << "\nStudent Not Found";
}
void deletestd()
{
ofstream tempfile("temp.txt");
ifstream file("file.txt");
string name, semester;
int id, findid;
double gpa;
if (file.good())
{
cout << "\nEnter The Student You Want To Delete : ";
cin >> findid;
while (file >> id&&cin.ignore(40, '\n'), getline(file, name) && file >> semester, file >> gpa)
{
if (findid != id)
{
tempfile << id << endl;
tempfile << name << endl;
tempfile << semester << endl;
tempfile << gpa << endl;
}
}
}
else
{
cerr << "\nFile not found\n";
}
file.close();
tempfile.close();
delete("file.txt");
rename("tempfile.txt", "file.txt");
}
void editstd()
{
// what should i do
}
int main()
{
insert();
insert();
insert();
display();
display();
deletestd();
system("pause");
}
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