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DSA PROJECT.cpp
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DSA PROJECT.cpp
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#include <iostream>
#include <limits>
using namespace std;
class Student {
public:
string name;
int rollNumber;
string course;
int totalMarks;
Student* next;
Student(string n, int r, string c, int m) : name(n), rollNumber(r), course(c), totalMarks(m), next(NULL) {}
};
class StudentRecordManagement {
private:
Student* head;
public:
StudentRecordManagement() : head(NULL) {}
bool isRollNumberExist(int rollNumber) const {
Student* current = head;
while (current != NULL) {
if (current->rollNumber == rollNumber) {
return true;
}
current = current->next;
}
return false;
}
void insertStudent(const string& name, int rollNumber, const string& course, int totalMarks) {
if (isRollNumberExist(rollNumber)) {
cout << "Student with Roll Number " << rollNumber << " already exists. Cannot add duplicate records.\n";
return;
}
if (totalMarks > 100) {
cout << "Total marks cannot be greater than 100.\n";
return;
}
Student* newStudent = new Student(name, rollNumber, course, totalMarks);
newStudent->next = head;
head = newStudent;
system("cls");
cout << "Student record added successfully.\n";
}
void deleteStudent(int rollNumber) {
Student* temp = head;
Student* prev = NULL;
if (temp != NULL && temp->rollNumber == rollNumber) {
head = temp->next;
delete temp;
cout << "Student record deleted successfully.\n";
return;
}
while (temp != NULL && temp->rollNumber != rollNumber) {
prev = temp;
temp = temp->next;
}
if (temp == NULL) {
cout << "Student record not found.\n";
return;
}
prev->next = temp->next;
delete temp;
cout << "Student record deleted successfully.\n";
}
void showStudents() const {
Student* current = head;
if (current == NULL) {
cout << "No student records available.\n";
return;
}
while (current != NULL) {
cout << "Name: " << current->name << ", Roll Number: " << current->rollNumber
<< ", Course: " << current->course << ", Total Marks: " << current->totalMarks << endl;
current = current->next;
}
}
void searchStudent(int rollNumber) const {
Student* current = head;
while (current != NULL) {
if (current->rollNumber == rollNumber) {
cout << "Name: " << current->name << ", Roll Number: " << current->rollNumber
<< ", Course: " << current->course << ", Total Marks: " << current->totalMarks << endl;
return;
}
current = current->next;
}
cout << "Student record not found.\n";
}
};
void displayMainMenu() {
cout << "\n=====================================\n";
cout << " Student Record Management\n";
cout << "=====================================\n";
cout << "1. Insert Student Record\n";
cout << "2. Delete Student Record\n";
cout << "3. Show All Student Records\n";
cout << "4. Search Student Record\n";
cout << "5. Exit\n";
cout << "=====================================\n";
cout << "Select an option: ";
}
int getValidatedIntInput() {
int input;
while (true) {
cin >> input;
if (cin.fail()) {
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "Invalid input. Please enter a valid integer: ";
} else {
cin.ignore(numeric_limits<streamsize>::max(), '\n');
return input;
}
}
}
string getValidatedStringInput(const string& prompt) {
string input;
cout << prompt;
cin.ignore();
getline(cin, input);
return input;
}
int main() {
StudentRecordManagement sys;
char choice;
while (true) {
displayMainMenu();
cin >> choice;
if (!isdigit(choice)) {
system("cls");
cout << "Invalid choice. Please enter a number between 1 and 5.\n";
continue;
}
if (choice == '5') {
break;
}
string name, course;
int rollNumber, totalMarks;
switch (choice) {
case '1':
cout << "------------------------------\n";
cout << " Insert Student Record\n";
cout << "------------------------------\n";
name = getValidatedStringInput("Enter Student Name: ");
cout << "Enter Roll Number: ";
rollNumber = getValidatedIntInput();
course = getValidatedStringInput("Enter Course: ");
cout << "Enter Total Marks: ";
totalMarks = getValidatedIntInput();
sys.insertStudent(name, rollNumber, course, totalMarks);
break;
case '2':
cout << "------------------------------\n";
cout << " Delete Student Record\n";
cout << "------------------------------\n";
cout << "Enter Roll Number of Student to Delete: ";
rollNumber = getValidatedIntInput();
sys.deleteStudent(rollNumber);
break;
case '3':
cout << "------------------------------\n";
cout << " Show All Student Records\n";
cout << "------------------------------\n";
sys.showStudents();
break;
case '4':
cout << "------------------------------\n";
cout << " Search Student Record\n";
cout << "------------------------------\n";
cout << "Enter Roll Number of Student to Search: ";
rollNumber = getValidatedIntInput();
sys.searchStudent(rollNumber);
break;
default:
system("cls");
cout << "Invalid choice. Please try again.\n";
break;
}
}
return 0;
}