CodSoft/File handling.cpp at main · RutujaGaikwad45/CodSoft · GitHub

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#include<iostream>
#include<fstream>
using namespace std;

class student{
	public:
	int roll;
	char div;
	char name[10];

	void take()
	{
		cout<<"\nEnter name:";
		cin>>name;
		cout<<"\nEnter roll no:";
		cin>>roll;
		cout<<"\nEnter div:";
		cin>>div;
	}

	void put()
	{
		cout<<"Name:"<<name<<endl;
		cout<<"Roll no:"<<roll<<endl;
		cout<<"Div:"<<div<<endl;
	}

};

int main()
{
	int ch;
	int n;

	do{
		cout<<"1.create and  write\n2.read\n3.search\n4.append\n5.delete\n";
		cout<<"Choose option:";
		cin>>ch;

		switch(ch)
		{

		case 1:
			cout<<"Enter no of students:";
			cin>>n;
			student s[10];
			int i;
			fstream fp;
			fp.open("student.txt",ios::out);
			cout<<endl;
			for(i=0;i<n;i++)
			{
				s[i].take();
				fp.write((char*)&s[i],sizeof(s[i]));
			}
			break;


		case 2:
			fstream fr;
			fr.open("student.txt",ios::in);
			student s1;
			while(fr.read((char*)&s1,sizeof(s1)))
			{
			s1.put();
			}
			break;

		case 3:
			student s;
			int r;
			int flag=0;
			cout<<"Enter roll no to be searched:";
			cin>>r;
			fstream fs;
			fs.open("student.txt",ios::in);
			while(fs.read((char*)&s,sizeof(s)))
			{
				if(s.roll==r)
				{
					cout<<"record found\n";
					s.put();
					flag=1;
				}
			}
			if(flag==0)
				cout<<"Record not found\n";
			break;

		case 4:
			student s[10];
			int i;
			int n1;
			fstream fa;
			fa.open("student.txt",ios::app);
			cout<<"Enter no of student you want to add:";
			cin>>n1;
			for(i=0;i<n1;i++)
			{
				s[i].take();
				fa.write((char*)&s[i],sizeof(s[i]));
			}
			break;


		case 5:
			fstream fp;
			fstream fp1;
			int delroll;
			int flag=0;
			student s;
			fp.open("student.txt",ios::in);
			fp1.open("stud.txt",ios::out);
			cout<<"Enter roll to be deleted:";
			cin>>delroll;
			while(fp.read((char*)&s,sizeof(s)))
			{
				if(s.roll==delroll)
				{
					cout<<"record found\n";
					s.put();
					flag=1;
				}
				else
					fp1.write((char*)&s,sizeof(s));
			}
			remove("student.txt");
			rename("stud.txt","student.txt");
			if(flag==0)
				cout<<"Record not found\n";
			break;
			}
		}while(ch!=0);
	return 0;
}