C++中出现很长"No match for 'operator+'"错误
Getting very long "No match for 'operator+'" error in C++
我已经不再使用C++了，正在为我正在学习的课程编写一个"Bank"类。每次尝试编译Bank.cpp文件时，我都会遇到一个长错误。我怀疑我遗漏了一些显而易见的东西，但我不知道是什么，因为这个错误对我来说没有任何意义
以下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
这是我收到的一个神秘的错误：
Bank.cpp：在成员函数'void Bank:：deposit(double，std:：string)'中：Bank.cpp:17:错误："(银行*)this)->银行：：储蓄+金额"中的"operator+"不匹配Bank.cpp:19:错误："(Bank*)this)->Bank:：checking+=amount"中的"operator+="不匹配Bank.cpp：在成员函数"void Bank:：draw(double，std:：string)"中：Bank.cpp:26:错误：不匹配'operator-='in'((Bank*)this)->Bank:：savement-=amount'Bank.cpp:28:错误："operator-="in"((Bank*)this)->Bank:：checking-=amount"不匹配Bank.cpp：在成员函数"void Bank:：transfer(double，std:：string)"中：Bank.cpp:35:错误："operator-="in"((Bank*)this)->Bank:：saving-=amount"不匹配Bank.cpp:36:错误："(Bank*)this)->Bank:：checking+=amount"中的"operator+="不匹配Bank.cpp:38:错误："operator-="in"((Bank*)this)->Bank:：checking-=amount"不匹配Bank.cpp:39:错误：在'((Bank*)this)->Bank:：储蓄+=amount'中没有匹配的'operator+='Bank.cpp：在成员函数"void Bank:：print_balands()"中：Bank.cpp:45:错误："operator<"不匹配<'在'std:：operator<lt；[with_Traits=std:：char_Traits](((std:：basic_stream>&)(&std:：cout))，((const-char*)"Savings:$")<lt；((银行*)本)->银行：：储蓄'//usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../include/c++/4.4.7/ostream:108：注意：候选为：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_stream<_CharT，_Traits>&()/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/ostream:117:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_ios<_CharT，_Traits>&()/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/ostream:127:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：ios_base&()(std:；ios_base\amp；))[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长整型)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长无符号int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(bool)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:91:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(短int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(短无符号int)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:105:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(unsigned int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(long-long-int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(long-long unsigned int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(双)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(浮点)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长双)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(const void)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:119：注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_streambuf<_CharT，_Traits>)[其中_CharT=char，_Trait=std:：char_Traits]Bank.cpp:46:错误："operator<"不匹配<'在'std:：operator<lt；[with_Traits=std:：char_Traits](((std:：basic_stream>&)(&std:：cout))，((const-char)"Checking:$")<lt；((银行*)本)->银行：：支票'//usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../include/c++/4.4.7/ostream:108：注意：候选为：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_stream<_CharT，_Traits>&()/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/ostream:117:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_ios<_CharT，_Traits>&()/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/ostream:127:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：ios_base&()(std:；ios_base\amp；))[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长整型)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长无符号int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(bool)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:91:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(短int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(短无符号int)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:105:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(unsigned int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(long-long-int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(long-long unsigned int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(双)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(浮点)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长双)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(const void)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:119：注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_streambuf<_CharT，_Traits>)[其中_CharT=char，_Trait=std:：char_Traits][004709613@jb359-5Lab1]$Bank.cpp:在成员函数"void Bank:：deposit(double，std:：string)"中：-bash:意外令牌
(' [004709613@jb359-5 Lab1]$ Bank.cpp:17: error: no match for ‘operator+’ in ‘((Bank*)this)->Bank::savings + amount’ -bash: syntax error near unexpected token('[004709613@jb359-5Lab1]$Bank.cpp:19:错误："(Bank)this)->Bank:：checking+=amount"中的"operator+="不匹配-bash:意外令牌(' [004709613@jb359-5 Lab1]$ Bank.cpp: In member function ‘void Bank::withdraw(double, std::string)’: -bash: syntax error near unexpected token('[004709613@jb359-5Lab1]$Bank.cpp:26:错误："operator-="in"((Bank*)this)->Bank:：saving-=amount"不匹配-bash:意外令牌(' [004709613@jb359-5 Lab1]$ Bank.cpp:28: error: no match for ‘operator-=’ in ‘((Bank*)this)->Bank::checking -= amount’ -bash: syntax error near unexpected token('[004709613@jb359-5Lab1]$Bank.cpp:在成员函数"void Bank:：transfer(double，std:：string)"中：-bash:意外令牌(' [004709613@jb359-5 Lab1]$ Bank.cpp:35: error: no match for ‘operator-=’ in ‘((Bank*)this)->Bank::savings -= amount’ -bash: syntax error near unexpected token('[004709613@jb359-5Lab1]$Bank.cpp:36:错误："(Bank*)this)->Bank:：checking+=amount"中的"operator+="不匹配-bash:意外令牌(' [004709613@jb359-5 Lab1]$ Bank.cpp:38: error: no match for ‘operator-=’ in ‘((Bank*)this)->Bank::checking -= amount’ -bash: syntax error near unexpected token('[004709613@jb359-5Lab1]$Bank.cpp:39:错误："(Bank*)this)->Bank:：saves+=amount"中的"operator+="不匹配-bash:意外令牌(' [004709613@jb359-5 Lab1]$ Bank.cpp: In member function ‘void Bank::print_balances()’: -bash: syntax error near unexpected token('[004709613@jb359-5Lab1]$Bank.cpp:45:错误："operator<lt；'在'std:：operator<lt；[with_Traits=std:：char_Traits](((std:：basic_stream>&)(&std:：cout))，((const-char*)"Savings:$")<lt；((银行*)本)->银行：：储蓄'//usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../include/c++/4.4.7/ostream:108：注意：候选为：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_stream<_CharT，_Traits>&()/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/ostream:117:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_ios<_CharT，_Traits>&()/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/ostream:127:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：ios_base&()(std:；ios_base\amp；))[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长整型)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长无符号int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(bool)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:91:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(短int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(短无符号int)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:105:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(unsigned int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(long-long-int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(long-long unsigned int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(双)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(浮点)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长双)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(const void)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:119：注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_streambuf<_CharT，_Traits>)[其中_CharT=char，_Trait=std:：char_Traits]Bank.cpp:46:错误："operator<"不匹配<'在'std:：operator<lt；[with_Traits=std:：char_Traits](((std:：basic_stream>&)(&std:：cout))，((const-char)"Checking:$")<lt；((银行*)本)->银行：：支票'//usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../include/c++/4.4.7/ostream:108：注意：候选为：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_stream<_CharT，_Traits>&()/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/ostream:117:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_ios<_CharT，_Traits>&()/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/ostream:127:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：ios_base&()(std:；ios_base\amp；))[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长整型)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长无符号int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(bool)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:91:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(短int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(短无符号int)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:105:注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(unsigned int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(long-long-int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(long-long unsigned int)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(双)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(浮点)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(长双)[其中_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_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(const void)[其中_CharT=char，_Traits=std:：char_Traits]/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../include/c++/4.4.7/bits/sostream.tcc:119：注意：std:：basic_stream<_CharT，_Traits>&std:：basic_stream<_CharT，_Traits>：：运算符<lt；(std:：basic_streambuf<_CharT，_Traits>*)[其中_CharT=char，_Trait=std:：char_Traits]
有人知道我做错了什么吗？我确信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，很难做到这一点。
您需要为Account类定义+运算符，以便它知道该做什么。由于您试图添加一个带有double的Account对象，因此您需要这个。
double Account::operator+(const double value) const {
return balance + value;
}
如果你想添加两个帐户对象，你可以用这个重载。
Account Account::operator+(const Account &other) const {
return Account(balance + other.balance, interest_rate);
}
如果你不想在类中添加额外的运算符，那么不要写：
savings = savings + amount;
使用Account类已经声明的方法，并写入：
savings.deposit(amount);
我怀疑您将保存和检查私人成员声明为"Account"，而不是双重声明。即使这是您想要的设计，也不能在没有显式定义运算符+(const Account&)的情况下添加用户定义的类对象。
在源代码的这一行中：
savings = savings + amount;
savings具有Account的类型，但是amount是double。除非在Account类(如)上定义+成员运算符
Account operator+(const double value) const;
或者像这样的全局+运算符(可能作为friend函数)
Account operator+(const Account& account, const double value);
那么你就不能做这样的加法了。
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