#include <iostream>
#include <fstream>
#include <vector>
#include <sstream>
using namespace std;
class Loan {
private:
int loanId;
double loanAmount;
double interestRate;
int loanTerms;
string loanStatus;
string borrowerDetails;
public:
Loan(int id, double amount, double rate, int terms, string status, string details)
: loanId(id), loanAmount(amount), interestRate(rate), loanTerms(terms), loanStatus(status), borrowerDetails(details) {}
int getLoanId() const {
return loanId;
}
double getLoanAmount() const {
return loanAmount;
}
double getInterestRate() const {
return interestRate;
}
int getLoanTerms() const {
return loanTerms;
}
string getLoanStatus() const {
return loanStatus;
}
string getBorrowerDetails() const {
return borrowerDetails;
}
};
class LoanManagementSystem {
private:
vector<Loan> loans;
public:
void addLoan(const Loan& loan) {
loans.push_back(loan);
}
void updateLoan(int loanId, double newAmount, double newRate, int newTerms, string newStatus, string newDetails) {
for (Loan& loan : loans) {
if (loan.getLoanId() == loanId) {
loan = Loan(loanId, newAmount, newRate, newTerms, newStatus, newDetails);
cout << "Loan updated successfully." << endl;
return;
}
}
cout << "Loan not found." << endl;
}
void displayLoans() const {
for (const Loan& loan : loans) {
cout << "Loan ID: " << loan.getLoanId() << endl;
cout << "Loan Amount: $" << loan.getLoanAmount() << endl;
cout << "Interest Rate: " << loan.getInterestRate() << "%" << endl;
cout << "Loan Terms: " << loan.getLoanTerms() << " months" << endl;
cout << "Loan Status: " << loan.getLoanStatus() << endl;
cout << "Borrower Details: " << loan.getBorrowerDetails() << endl;
cout << "------------------------" << endl;
}
}
void deleteLoan(int loanId) {
for (auto it = loans.begin(); it != loans.end(); ++it) {
if (it->getLoanId() == loanId) {
loans.erase(it);
cout << "Loan deleted successfully." << endl;
return;
}
}
cout << "Loan not found." << endl;
}
void saveLoansToFile(const string& filename) const {
ofstream file(filename);
if (file.is_open()) {
for (const Loan& loan : loans) {
file << loan.getLoanId() << "," << loan.getLoanAmount() << "," << loan.getInterestRate() << ","
<< loan.getLoanTerms() << "," << loan.getLoanStatus() << "," << loan.getBorrowerDetails() << endl;
}
file.close();
cout << "Loans saved to file successfully." << endl;
} else {
cout << "Unable to open the file." << endl;
}
}
void loadLoansFromFile(const string& filename) {
loans.clear();
ifstream file(filename);
if (file.is_open()) {
int loanId, loanTerms;
double loanAmount, interestRate;
string loanStatus, borrowerDetails;
string line;
while (getline(file, line)) {
stringstream ss(line);
getline(ss, line, ',');
loanId = stoi(line);
getline(ss, line, ',');
loanAmount = stod(line);
getline(ss, line, ',');
interestRate = stod(line);
getline(ss, line, ',');
loanTerms = stoi(line);
getline(ss, line, ',');
loanStatus = line;
getline(ss, line, ',');
borrowerDetails = line;
Loan loan(loanId, loanAmount, interestRate, loanTerms, loanStatus, borrowerDetails);
loans.push_back(loan);
}
file.close();
cout << "Loans loaded from file successfully." << endl;
} else {
cout << "Unable to open the file." << endl;
}
}
vector<Loan> searchLoansByStatus(const string& status) const {
vector<Loan> result;
for (const Loan& loan : loans) {
if (loan.getLoanStatus() == status) {
result.push_back(loan);
}
}
return result;
}
double calculateTotalLoanAmount() const {
double totalAmount = 0.0;
for (const Loan& loan : loans) {
totalAmount += loan.getLoanAmount();
}
return totalAmount;
}
double calculateAverageLoanAmount() const {
double totalAmount = calculateTotalLoanAmount();
return totalAmount / loans.size();
}
};
void displayMenu() {
cout << "===== Loan Management System =====" << endl;
cout << "1) Manage Loans" << endl;
cout << "2) Search Loans" << endl;
cout << "3) Reports of Loans" << endl;
cout << "4) Exit" << endl;
cout << "Enter your choice: ";
}
int main() {
LoanManagementSystem lms;
while (true) {
displayMenu();
int choice;
cin >> choice;
switch (choice) {
case 1: {
cout << "===== Manage Loans =====" << endl;
cout << "1) Add Loan" << endl;
cout << "2) Update Loan" << endl;
cout << "3) Display Loans" << endl;
cout << "4) Delete Loan" << endl;
cout << "5) Exit" << endl;
cout << "Enter your choice: ";
int manageChoice;
cin >> manageChoice;
switch (manageChoice) {
case 1: {
cout << "Enter Loan ID: ";
int loanId;
cin >> loanId;
cout << "Enter Loan Amount: $";
double loanAmount;
cin >> loanAmount;
cout << "Enter Interest Rate (%): ";
double interestRate;
cin >> interestRate;
cout << "Enter Loan Terms (months): ";
int loanTerms;
cin >> loanTerms;
cin.ignore();
cout << "Enter Loan Status: ";
string loanStatus;
getline(cin, loanStatus);
cout << "Enter Borrower Details: ";
string borrowerDetails;
getline(cin, borrowerDetails);
Loan loan(loanId, loanAmount, interestRate, loanTerms, loanStatus, borrowerDetails);
lms.addLoan(loan);
cout << "Loan added successfully." << endl;
break;
}
case 2: {
cout << "Enter Loan ID to update: ";
int loanId;
cin >> loanId;
cout << "Enter New Loan Amount: $";
double newLoanAmount;
cin >> newLoanAmount;
cout << "Enter New Interest Rate (%): ";
double newInterestRate;
cin >> newInterestRate;
cout << "Enter New Loan Terms (months): ";
int newLoanTerms;
cin >> newLoanTerms;
cin.ignore();
cout << "Enter New Loan Status: ";
string newLoanStatus;
getline(cin, newLoanStatus);
cout << "Enter New Borrower Details: ";
string newBorrowerDetails;
getline(cin, newBorrowerDetails);
lms.updateLoan(loanId, newLoanAmount, newInterestRate, newLoanTerms, newLoanStatus, newBorrowerDetails);
break;
}
case 3: {
cout << "===== Display Loans =====" << endl;
lms.displayLoans();
break;
}
case 4: {
cout << "Enter Loan ID to delete: ";
int loanId;
cin >> loanId;
lms.deleteLoan(loanId);
break;
}
case 5:
break;
default:
cout << "Invalid choice." << endl;
break;
}
break;
}
case 2: {
cout << "===== Search Loans =====" << endl;
cout << "Enter Loan Status to search: ";
cin.ignore();
string searchStatus;
getline(cin, searchStatus);
vector<Loan> searchResult = lms.searchLoansByStatus(searchStatus);
if (searchResult.empty()) {
cout << "No loans found with the given status." << endl;
} else {
cout << "Loans with status '" << searchStatus << "':" << endl;
for (const Loan& loan : searchResult) {
cout << "Loan ID: " << loan.getLoanId() << endl;
cout << "Loan Amount: $" << loan.getLoanAmount() << endl;
cout << "Interest Rate: " << loan.getInterestRate() << "%" << endl;
cout << "Loan Terms: " << loan.getLoanTerms() << " months" << endl;
cout << "Borrower Details: " << loan.getBorrowerDetails() << endl;
cout << "------------------------" << endl;
}
}
break;
}
case 3: {
cout << "===== Reports of Loans =====" << endl;
double totalAmount = lms.calculateTotalLoanAmount();
double averageAmount = lms.calculateAverageLoanAmount();
cout << "Total Loan Amount: $" << totalAmount << endl;
cout << "Average Loan Amount: $" << averageAmount << endl;
break;
}
case 4:
lms.saveLoansToFile("loans.txt");
cout << "Exiting the program. Goodbye!" << endl;
return 0;
default:
cout << "Invalid choice." << endl;
break;
}
}
return 0;
}
