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file_handling2.cpp
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file_handling2.cpp
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// Online IDE - Code Editor, Compiler, Interpreter
#include<iostream>
#include<fstream>
using namespace std;
class Student
{
public:
string name;
int rollno;
string branch;
friend ofstream & operator<<(ofstream &ofs, Student &s);
friend ifstream & operator>>(ifstream &ifs, Student &s);
};
ofstream & operator<<(ofstream &ofs, Student &s)
{
ofs<<s.name<<endl;
ofs<<s.rollno<<endl;
ofs<<s.branch<<endl;
return ofs;
}
ifstream & operator>>(ifstream &ifs, Student &s)
{
ifs>>s.name;
ifs>>s.rollno;
ifs>>s.branch;
return ifs;
}
int main()
{
// ofstream outfile("demo.txt");
// outfile<<"hello"<<endl;
// outfile<<123<<endl;
// outfile.close();
Student s1;
s1.name = "Dev";
s1.rollno = 10;
s1.branch = "EC";
ofstream ofs("demo.txt");
ofs<<s1;
s1.name = "Devil";
s1.rollno = 11;
s1.branch = "EC";
ofs<<s1;
s1.name = "Devid";
s1.rollno = 12;
s1.branch = "EC";
ofs<<s1;
ofs.close();
Student s2;
ifstream ifs;
ifs.open("demo.txt");
ifs>>s2;
cout<<s2.name<<" "<<s2.rollno<<" "<<s2.branch<<endl;
ifs>>s2;
cout<<s2.name<<" "<<s2.rollno<<" "<<s2.branch<<endl;
ifs>>s2;
cout<<s2.name<<" "<<s2.rollno<<" "<<s2.branch<<endl;
Student s3;
ifs>>s3;
cout<<s3.name<<" "<<s3.rollno<<" "<<s3.branch<<endl;
if(ifs.eof())
{
cout<<"eof reached"<<endl;
}
ifs.close();
}