在C ++中获得很长的“不匹配'运算符+'”错误

Question

我没有使用C ++练习，正在为我正在学习的课程写一个“银行”课程。 每当我尝试编译Bank.cpp文件时，我都会收到很长的错误。 我怀疑我在这里遗漏了一些非常明显的东西，但我不知道是什么，因为错误对我没有任何意义。

这是我正在编写的无法编译的cpp文件：

#include <iostream>

#include "Bank.h"

Bank::Bank(): savings(0), checking(0) { }

Bank::Bank(double savings_amount, double checking_amount): savings(savings_amount), checking(checking_amount) { }

void Bank::deposit(double amount, string account)
{
        if (account == "S") {
                savings = savings + amount;
        } else {
                checking += amount;
        }
}

void Bank::withdraw(double amount, string account)
{
        if (account == "S") {
                savings -= amount;
        } else {
                checking -= amount;
        }
}

void Bank::transfer(double amount, string account)
{
        if (account == "S") {
                savings -= amount;
                checking += amount;
        } else {
            checking -= amount;
        }
}

void Bank::transfer(double amount, string account)
{
        if (account == "S") {
                savings -= amount;
                checking += amount;
        } else {
                checking -= amount;
                savings += amount;
        }
}

void Bank::print_balances()
{
        cout << "Savings: $ " << savings;
        cout << "Checking: $ " << checking;
}

这是头文件：

#ifndef BANK_H
#define BANK_H

#include <string>

#include "Account.h"

using namespace std;

class Bank {
private:
    Account savings;
    Account checking;
public:
    Bank();
    Bank(double savings_amount, double checking_amount);
    void deposit(double amount, string account);
    void withdraw(double amount, string account);
    void transfer(double amount, string account);
    void print_balances();
};

#endif

这里是顶部引用的“Account.h”头文件：

#ifndef ACCOUNT_H
#define ACCOUNT_H


class Account {
private:
    double balance;
    double interest_rate;
public:
    Account();
    Account(double amount, double rate);
    void deposit(double);
    bool withdraw(double);
    double query();
    void set_interest_rate(double rate);
    double get_interest_rate();
    void add_interest();
};

#endif

这是我收到的神秘错误：

Bank.cpp：在成员函数'void Bank :: deposit（double，std :: string）'中：Bank.cpp：17：错误：在'（（Bank *）this中'运算符+'不匹配 - > Bank： ：储蓄+金额'Bank.cpp：19：错误：'运营商+ ='不匹配'（（银行*）这个） - >银行::检查+ =金额'Bank.cpp：在成员函数中'void Bank： ：withdraw（double，std :: string）'：Bank.cpp：26：错误：'（（Bank *）this中'operator- ='不匹配 - > Bank :: savings - = amount'Bank.cpp ：28：错误：'（（Bank *）这里的'operator- ='不匹配 - > Bank :: checking - = amount'Bank.cpp：在成员函数'void Bank :: transfer（double，std： ：string）'：Bank.cpp：35：错误：'（（Bank *）这里的'operator- ='不匹配 - > Bank :: savings - = amount'Bank.cpp：36：错误：不匹配for'operator + ='in'（（Bank *）this） - > Bank :: checking + = amount'Bank.cpp：38：error：'match- ='in'（（Bank *）this） - >银行：检查 - =金额'Bank.cpp：39：错误：'运营商+ ='不匹配'（（银行*）这个） - >银行::储蓄+ =金额'Bank.cpp：成员函数'void Bank :: print_balances（）'： Bank.cpp：45：错误：'std :: operator <<中没有匹配'operator <<'[与_Traits = std :: char_traits]（（（std :: basic_ostream>＆）（＆std :: cout） ），（（const char *）“Savings：$”））<<（（Bank *）this） - > Bank :: savings'/usr/lib/gcc/x86_64-redhat-linux/4.4.7/ .. /../../../include/c++/4.4.7/ostream:108：注意：候选人是：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator < <（std :: basic_ostream <_CharT，_Traits>＆（ ）（std :: basic_ostream <_CharT，_Traits>＆））[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat -linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / ostream：117：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT， _Traits> :: operator <<（std :: basic_ios <_CharT，_Traits>＆（ ）（std :: basic_ios <_CharT，_Traits>＆））[with _CharT = char，_Traits = std :: char_traits] / usr / lib /gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:127：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: ios_bas e＆（ ）（std :: ios_base＆））[with _CharT = char，_ Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../。 ./include/c++/4.4.7/ostream:165：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long int）[with _CharT = char， _Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:169：注意： std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long unsigned int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64 -redhat-linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / ostream：173：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream < _CharT，_Traits> :: operator <<（bool）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../ .. /../include/c++/4.4.7/bits/ostream.tcc:91：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（short int） [_CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:180:note:std :: basic_ostream <_CharT，_ Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（short unsigned int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat- linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / bits / ostream.tcc：105：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../。 ./../include/c++/4.4.7/ostream:191：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（unsigned int）[with _CharT = char，_ Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:200 ：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long long int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / GCC / x86_64的-红帽-LINUX / 4 .4.7 /../../../../ include / c ++ / 4.4.7 / ostream：204：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long long unsigned int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../ .. /include/c++/4.4.7/ostream:209：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（double）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:213:note:std： ：basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（float）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux /4.4.7/../../../../include/c++/4.4.7/ostream:221：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long double）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../ .. /include/c++/4.4.7/ostream:225：注意：std :: b asic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（const void ）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux /4.4.7/../../../../include/c++/4.4.7/bits/ostream.tcc:119：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream < _CharT，_Traits> :: operator <<（std :: basic_streambuf <_CharT，_Traits> ）[with _CharT = char，_Traits = std :: char_traits] Bank.cpp：46：错误：不匹配'operator <<'in 'std :: operator << [with _Traits = std :: char_traits]（（（std :: basic_ostream>＆）（＆std :: cout）），（（const char ）“Checking：$”））<<（ （银行*）此） - >银行::检查'/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ ostream：108：注意：候选人是：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: basic_ostream <_CharT，_Traits>＆（ ）（std :: basic_ostream <_CharT，_Traits>＆））[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../ .. /包括/ C ++ / 4。 4.7 / ostream：117：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: basic_ios <_CharT，_Traits>＆（ ）（std :: basic_ios <_CharT，_Traits>＆））[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../ include / c ++ / 4.4.7 / ostream：127：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: ios_base＆（ ）（std :: ios_base＆ ））[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4。 7 / ostream：165：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / ostream：169：注意：std :: basic_ostream <_CharT，_Traits >＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long unsigned int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7 /。 ./../../../include/c++/4.4.7/ostream:173：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（ bool）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4。 7 / bits / ostream.tcc：91：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（short int）[with _CharT = char，_Traits = std： ：char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:180：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（short unsigned int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux /4.4.7/../../../../include/c++/4.4.7/bits/ostream.tcc:105：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream < _CharT，_Traits> :: operator <<（int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../ .. /../include/c++/4.4.7/ostream:191：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（unsigned int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux /4.4.7/../../../../include/c++/4.4.7/ostream:200:note:std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long long int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../。 ./include/c++/4.4.7/ostream:204：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long long unsigned int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:209：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（double）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64 -redhat-linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / ostream：213：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream < _CharT，_Traits> :: operator <<（float）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../ .. /../include/c++/4.4.7/ostream:221：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long double）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:225：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（const void ）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / bits / ostream.tcc：119：注意：std :: basic_ostream <_CharT，_Traits>＆ std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: basic_streambuf <_CharT，_Traits> ）[with _CharT = char，_Traits = std :: char_traits] [004709613 @ jb359-5 Lab1] $ Bank.cpp ：在成员函数'void Bank :: deposit（double，std :: string）'中：-bash：意外令牌附近的语法错误(' [004709613@jb359-5 Lab1]$ Bank.cpp:17: error: no match for 'operator+' in '((Bank*)this)->Bank::savings + amount' -bash: syntax error near unexpected token (' [004709613@jb359-5 Lab1]$ Bank.cpp:17: error: no match for 'operator+' in '((Bank*)this)->Bank::savings + amount' -bash: syntax error near unexpected token （'[004709613 @ jb359-5 Lab1] $ Bank .cpp：19：错误：在'（（Bank ）this中'运算符+ ='不匹配 - > Bank :: checking + = (' [004709613@jb359-5 Lab1]$ Bank.cpp: In member function 'void Bank::withdraw(double, std::string)': -bash: syntax error near unexpected token ：意外令牌附近的语法错误(' [004709613@jb359-5 Lab1]$ Bank.cpp: In member function 'void Bank::withdraw(double, std::string)': -bash: syntax error near unexpected token （'[004709613 @ jb359-5 Lab1] $ Bank.cpp：26：错误：'（（Bank *）这里的'operator- ='不匹配 - > Bank :: savings - = (' [004709613@jb359-5 Lab1]$ Bank.cpp:28: error: no match for 'operator-=' in '((Bank*)this)->Bank::checking -= amount' -bash: syntax error near unexpected token ：意外令牌附近的语法错误(' [004709613@jb359-5 Lab1]$ Bank.cpp:28: error: no match for 'operator-=' in '((Bank*)this)->Bank::checking -= amount' -bash: syntax error near unexpected token amount'-bash (' [004709613@jb359-5 Lab1]$ Bank.cpp:28: error: no match for 'operator-=' in '((Bank*)this)->Bank::checking -= amount' -bash: syntax error near unexpected token （'[004709613 @ jb359-5 Lab1] $ Bank.cpp：在成员函数'void Bank :: transfer（double，std :: string）'中：-bash：意外令牌附近的语法错误(' [004709613@jb359-5 Lab1]$ Bank.cpp:35: error: no match for 'operator-=' in '((Bank*)this)->Bank::savings -= amount' -bash: syntax error near unexpected token (' [004709613@jb359-5 Lab1]$ Bank.cpp:35: error: no match for 'operator-=' in '((Bank*)this)->Bank::savings -= amount' -bash: syntax error near unexpected token （'[004709613 @ jb359-5 Lab1] $ Bank.cpp：36：错误：在'（（Bank *）this中'运营商+ ='不匹配 - > Bank :: checking + = (' [004709613@jb359-5 Lab1]$ Bank.cpp:38: error: no match for 'operator-=' in '((Bank*)this)->Bank::checking -= amount' -bash: syntax error near unexpected token意外令牌附近的语法错误(' [004709613@jb359-5 Lab1]$ Bank.cpp:38: error: no match for 'operator-=' in '((Bank*)this)->Bank::checking -= amount' -bash: syntax error near unexpected token amount'-bash： (' [004709613@jb359-5 Lab1]$ Bank.cpp:38: error: no match for 'operator-=' in '((Bank*)this)->Bank::checking -= amount' -bash: syntax error near unexpected token （'[004709613 @ jb359-5 Lab1] $ Bank.cpp：39：错误：'运算符+ ='不匹配'（（ Bank *）this） - > Bank :: savings + = (' [004709613@jb359-5 Lab1]$ Bank.cpp: In member function 'void Bank::print_balances()': -bash: syntax error near unexpected token意外令牌附近的语法错误(' [004709613@jb359-5 Lab1]$ Bank.cpp: In member function 'void Bank::print_balances()': -bash: syntax error near unexpected token （'[004709613 @ jb359-5 Lab1] $ Bank.cpp：45：错误：'std :: operator <<中的'operator <<'不匹配[与_Traits = std： ：char_traits]（（（std :: basic_ostream>＆）（＆std :: cout）），（（const char *）“Savings：$”））<<（（Bank *）this） - > Bank :: savings '/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:108：注意：candi 日期是：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: basic_ostream <_CharT，_Traits>＆（ ）（std :: basic_ostream <_CharT，_Traits> ＆））[与_CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4 .7 / ostream：117：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: basic_ios <_CharT，_Traits>＆（ ）（std :: basic_ios <_CharT，_Traits>＆））[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../ .. /include/c++/4.4.7/ostream:127：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: ios_base＆（ ）（std :: ios_base＆））[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4 .7 / ostream：165：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long int）[with _CharT = char，_Traits = std :: char _traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:169：注意：std :: basic_ostream < _CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long unsigned int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / ostream：173：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits>： ：operator <<（bool）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include /c++/4.4.7/bits/ostream.tcc:91:note:std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（short int）[with _CharT = char ，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:180:note ：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（short unsigned int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64的-红帽-LINUX / 4.4.7 / ../../../../include/c++/4.4.7/bits/ostream.tcc:105：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits>： ：operator <<（int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include /c++/4.4.7/ostream:191：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（unsigned int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:200:note:std :: basic_ostream <_CharT，_ Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long long int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat- linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / ostream：204：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits > :: operator <<（long long unsigned int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../ .. /../include/c++/4.4.7/ostream:209：没有 te：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（double）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64 -redhat-linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / ostream：213：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream < _CharT，_Traits> :: operator <<（float）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../ .. /../include/c++/4.4.7/ostream:221：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long double）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:225：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（const void ）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / bits / ostream.tcc：119：注意：std :: basic_ostream <_CharT，_Traits>＆的std :: basic_ostream <_C harT，_Traits> :: operator <<（std :: basic_streambuf <_CharT，_Traits> ）[with _CharT = char，_Traits = std :: char_traits] Bank.cpp：46：错误：不匹配'operator <<'in 'std :: operator << [with _Traits = std :: char_traits]（（（std :: basic_ostream>＆）（＆std :: cout）），（（const char ）“Checking：$”））<<（ （银行*）此） - >银行::检查'/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ ostream：108：注意：候选人是：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: basic_ostream <_CharT，_Traits>＆（ ）（std :: basic_ostream <_CharT，_Traits>＆））[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../ .. /include/c++/4.4.7/ostream:117：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: basic_ios <_CharT，_Traits>＆ （ ）（std :: basic_ios <_CharT，_Traits>＆））[with _CharT = char，_ Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../ .. /../../include/c++/4.4。 7 / ostream：127：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（std :: ios_base＆（ ）（std :: ios_base＆））[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:165：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / ostream：169：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long unsigned int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../ .. /../../include/c++/4.4.7/ostream:173：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（bool）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/ ostream.tcc：91：注意：std :: basic_o stream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（short int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64-redhat-linux /4.4.7/../../../../include/c++/4.4.7/ostream:180：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（short unsigned int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../。 ./include/c++/4.4.7/bits/ostream.tcc:105：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（int）[with _CharT = char，_ Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:191 ：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（unsigned int）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc /x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:200:note:std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_ Traits> :: operator <<（long long int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../ .. /../include/c++/4.4.7/ostream:204：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long long unsigned int）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream： 209：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（double）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc /x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:213：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（float）[with _CharT = char，_Traits = std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../ ../../include/c++/4.4.7/ostream:221：注意：std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（long double）[with _CharT = char，_ Tra 它的= std :: char_traits] /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:225：注意： std :: basic_ostream <_CharT，_Traits>＆std :: basic_ostream <_CharT，_Traits> :: operator <<（const void ）[with _CharT = char，_Traits = std :: char_traits] / usr / lib / gcc / x86_64- redhat-linux / 4.4.7 /../../../../ include / c ++ / 4.4.7 / bits / ostream.tcc：119：注意：std :: basic_ostream <_CharT，_Traits>＆std： ：basic_ostream <_CharT，_Traits> :: operator <<（std :: basic_streambuf <_CharT，_Traits> *）[with _CharT = char，_Traits = std :: char_traits]

谁知道我做错了什么？ 我确定这是非常愚蠢的事情。 我也可以发布头文件，但由于远程编辑问题，很难这样做。

Answer 1

如果您不想在类中添加额外的运算符，那么请不要写：

savings = savings + amount;

使用已经声明的Account类的方法并写：

savings.deposit(amount);

Answer 2

您需要为Account类定义+运算符，以便它知道该怎么做。 由于您尝试使用double添加Account对象，因此您需要这样做。

double Account::operator+(const double value) const {
    return balance + value;
}

如果要添加两个帐户对象，可以使用此方法重载。

Account Account::operator+(const Account &other) const {
    return Account(balance + other.balance, interest_rate);
}

Answer 3

我怀疑你宣布保存和检查私人成员为“帐户”而不是加倍。 即使这是您的预期设计，也无法在没有明确定义operator +（const Account＆）的情况下添加用户定义的类对象。

Answer 4

在这行源代码中：

            savings = savings + amount;

savings有一种Account ，但amount是double 。 除非你在Account类上定义一个+成员运算符

Account operator+(const double value) const;

或者像全局+运算符（可能作为friend函数）

Account operator+(const Account& account, const double value);

那么你不能做这样的补充。