file handling

File_handling/sarthak/delete_record.cpp

@@ -0,0 +1,34 @@
+#include<fstream>
+#include<iostream>
+using namespace std;
+struct student{
+	int admno;
+	char name[30];
+	char add[80];
+	float fees;
+};
+
+int main(){
+
+	ifstream fin("student.dat");
+	ofstream fout("temp.dat");
+
+	student s;
+	int tadmno;
+
+	cout<<"\n Enter Admno no that you want to delete ";
+	cin>>tadmno;
+
+	while(fin.read((char *)&s,sizeof(student))){
+		if(s.admno!=tadmno){
+			fout.write((char *)&s,sizeof(student));
+		} 
+	}	
+	fin.close();
+	fout.close();
+
+	remove("student.dat");
+	rename("temp.dat","student.dat");
+
+	return 0;
+}

File_handling/sarthak/duplicater.cpp

@@ -0,0 +1,14 @@
+#include<fstream>
+#include<iostream>
+using namespace std;
+int main(){
+	ifstream fin("sarthak.txt");
+	ofstream fout("dup.txt");
+	char ch;
+	while(fin.get(ch)){
+		fout<<ch;
+	}
+	fin.close();
+	fout.close();
+	return 0;
+}

File_handling/sarthak/file_read_student.cpp

@@ -0,0 +1,26 @@
+#include<fstream>
+#include<iostream>
+using namespace std;
+struct student{
+	int admno;
+	char name[30];
+	char add[80];
+	float fees;
+};
+
+int main(){
+
+	ifstream fin("student.dat");
+	student s;
+	cout<<"\n Data from file \n";
+
+	while(fin.read((char *)&s,sizeof(student))){
+		cout<<"\n Admno :"<<s.admno;
+		cout<<"\n Name  :"<<s.name;
+		cout<<"\n Address :"<<s.add;
+		cout<<"\n Fees :"<<s.fees;
+	}	
+	fin.close();
+
+	return 0;
+}

File_handling/sarthak/student_record_file.cpp

@@ -0,0 +1,32 @@
+#include<fstream>
+#include<iostream>
+using namespace std;
+struct student{
+	int admno;
+	char name[30];
+	char add[80];
+	float fees;
+};
+
+int main(){
+	ofstream fout("student.dat",ios::app);
+	student s;
+	char choice;
+	do{
+		cout<<"\n Enter admno :";
+		cin>>s.admno;
+		cout<<"\n Enter name : ";
+		cin>>s.name;
+		cout<<"\n Enter address :";
+		cin>>s.add;
+		cout<<"\n Enter fees : ";
+		cin>>s.fees;
+		fout.write((char *)&s, sizeof(student));
+		cout<<"\n Want to add more records(y/n) :";
+		cin>>choice;
+	}while(choice!='n');
+
+	fout.close();
+
+	return 0;
+}

File_handling/sarthak/update_record.cpp

@@ -0,0 +1,38 @@
+#include<fstream>
+#include<iostream>
+using namespace std;
+struct student{
+	int admno;
+	char name[30];
+	char add[80];
+	float fees;
+};
+
+int main(){
+
+	ifstream fin("student.dat");
+	ofstream fout("temp.dat");
+
+	student s;
+	int tadmno;
+
+	cout<<"\n Enter Admno no that you want to update ";
+	cin>>tadmno;
+
+	while(fin.read((char *)&s,sizeof(student))){
+		if(s.admno==tadmno){
+			cout<<"\n Enter new address :";
+			cin>>s.add;
+			cout<<"\n Enter new fees :";
+			cin>>s.fees;
+		} 
+		fout.write((char *)&s,sizeof(student));
+	}	
+	fin.close();
+	fout.close();
+
+	remove("student.dat");
+	rename("temp.dat","student.dat");
+
+	return 0;
+}