C++ 脑图（三）异常、STL

刀客123

已于 2025-02-26 08:48:12 修改

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分类专栏： C++ 文章标签： c++ 开发语言

于 2025-01-12 21:08:38 首次发布

本文链接：https://blog.youkuaiyun.com/dingyahui123/article/details/145090046

1、异常

异常举例

BankAccount.h

#ifndef BANK_ACCOUNT_H
#define BANK_ACCOUNT_H

#include <iostream>
#include <stdexcept>

class InsufficientFundsException : public std::runtime_error {
public:
    InsufficientFundsException() : std::runtime_error("Insufficient funds for this operation.") {}
};

class BankAccount {
private:
    std::string accountNumber;
    double balance;

public:
    BankAccount(const std::string& accNum) : accountNumber(accNum), balance(0.0) {}

    void deposit(double amount) {
        if (amount <= 0) {
            throw std::invalid_argument("Deposit amount must be positive.");
        }
        balance += amount;
        std::cout << "Deposited: " << amount << ", New Balance: " << balance << std::endl;
    }

    void withdraw(double amount) {
        if (amount > balance) {
            throw InsufficientFundsException();
        }
        balance -= amount;
        std::cout << "Withdrew: " << amount << ", New Balance: " << balance << std::endl;
    }

    double getBalance() const {
        return balance;
    }

    std::string getAccountNumber() const {
        return accountNumber;
    }
};

#endif // BANK_ACCOUNT_H

Bank.h

#ifndef BANK_H
#define BANK_H

#include <iostream>
#include <map>
#include "BankAccount.h"

class AccountNotFoundException : public std::runtime_error {
public:
    AccountNotFoundException(const std::string& accNum) 
        : std::runtime_error("Account not found: " + accNum) {}
};

class Bank {
private:
    std::map<std::string, BankAccount> accounts;

public:
    void createAccount(const std::string& accNum) {
        accounts.emplace(accNum, BankAccount(accNum));
        std::cout << "Account created: " << accNum << std::endl;
    }

    BankAccount& getAccount(const std::string& accNu