读取csv文件并用C++计算一个简单银行系统的余额

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <vector>

struct BankAccount {
    std::string accountNumber;
    std::string accountName;
    double balance;
};

std::vector<BankAccount> readCSV(const std::string& filename) {
    std::vector<BankAccount> accounts;
    std::ifstream file(filename);
    std::string line;

    while (std::getline(file, line)) {
        std::stringstream ss(line);
        std::string accountNumber, accountName, balanceStr;
        double balance;

        std::getline(ss, accountNumber, ',');
        std::getline(ss, accountName, ',');
        std::getline(ss, balanceStr, ',');

        std::stringstream(balanceStr) >> balance;

        BankAccount account;
        account.accountNumber = accountNumber;
        account.accountName = accountName;
        account.balance = balance;

        accounts.push_back(account);
    }

    file.close();
    return accounts;
}

double calculateTotalBalance(const std::vector<BankAccount>& accounts) {
    double totalBalance = 0.0;

    for (const auto& account : accounts) {
        totalBalance += account.balance;
    }

    return totalBalance;
}

int main() {
    std::vector<BankAccount> accounts = readCSV("bank_accounts.csv");
    double totalBalance = calculateTotalBalance(accounts);

    std::cout << "Total balance: " << totalBalance << std::endl;

    return 0;
}