C++ xstring中未定义的类型和未声明的标识符

我一直在创建一个类，它定义了一个以10为基数的整数。今天，当我尝试编译时，我在xstring中得到了一长串错误，这些错误似乎主要是未定义的类型错误或未声明的标识符错误。我想知道这是因为忘记包含一些文件还是我误用了字符串

intBase.cpp（我可能错误处理字符串的类）

#包括“intBase.h”
intBase:：intBase（intb）
{
基数=b；
num=0；
}
intBase:：intBase（std:：string n，intb）
{
基数=b；
setNum（n）；
}
int intBase:：getBase（）常量
{
返回基地；
}
void intBase:：setBase（intb）
{
基数=b；
}
std:：string intBase:：getNum（）常量
{
int expo=0，n，numTemp=num；
std:：string result=“”；
char ch；
而（num>int（pow（base，expo）））
{
世博会++；
}
世博会；
而（世博会>=0）
{
n=int（numTemp/pow（基地、博览会））；
ch=转换（n，假）；
numTemp-=int（n*pow（base，expo））；
结果+=ch；
世博会；
}
返回结果；
}
void intBase:：setNum（std:：string n）
{
char ch；
国际博览会，临时；
num=0；
expo=0；
而（n.size（）>0）
{
ch=n[n.大小（）-1]；
温度=转换（ch，真）；
num+=int（temp*pow（base，expo））；
世博会++；
n=n.substr（0，n.size（）-1）；
}
}
int intBase:：getNumTen（）常量
{
返回num；
}
void intBase:：setNumTen（int n）
{
num=n；
}
intBase intBase:：add（const intBase和iBase）const
{
intBase-IB（1）；
if（getBase（）>iBase.getBase（））
{
IB.挫折（基础）；
}
其他的
{
IB.挫折（基础）；
}
IB.setNumTen（getNumTen（）+iBase.getNumTen（））；
返回IB；
}
intBase intBase:：运算符+（常量intBase和iBase）常量
{
返回add（iBase）；
}
std:：ostream&operatorC:\Program Files（x86）\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring（4519）：消息：with
1> C:\ProgramFiles（x86）\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring（4519）：消息：[
1> C:\ProgramFiles（x86）\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring（4519）：消息：_Elem=char，
1> C:\ProgramFiles（x86）\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring（4519）：消息：_SizeT=unsigned int
1> C:\ProgramFiles（x86）\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring（4519）：消息：]
1> E:\college\numBaseTest\numBaseTest\numBaseTest\intBase.cpp（104）：消息：请参阅函数模板实例化“std:：basic\u ostream&std:：operator”您缺少对sstream的包含。将其添加到intBase.h的顶部：

#pragma once
#include <sstream>
#include <string>
#include <cmath>

#pragma一次
#包括
#包括
#包括
您缺少对sstream的包含。将其添加到intBase.h的顶部：

#pragma once
#include <sstream>
#include <string>
#include <cmath>

#pragma一次
#包括
#包括
#包括

#include <iostream>
#include "intBase.h"
#include <string>
using namespace std;

int main()
{
    int base;
    string numTemp;

    cout << "enter the base of your number: ";
    cin >> base;
    intBase num(base);

    cout << "enter a number in base " << base << ": ";
    cin >> numTemp;
    num.setNum(numTemp);

    cout << num.getNumTen() << endl;
    cout << num << endl;
    cout << num + num << endl;

    system("pause");
    return 0;
}

1>------ Build started: Project: numBaseTest, Configuration: Debug Win32 ------
1>intBase.cpp
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(435,23): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(4519): message : see reference to function template instantiation 'std::basic_ostream<char,std::char_traits<char>> &std::_Insert_string<char,std::char_traits<char>,unsigned int>(std::basic_ostream<char,std::char_traits<char>> &,const _Elem *const ,const _SizeT)' being compiled
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(4519): message :         with
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(4519): message :         [
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(4519): message :             _Elem=char,
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(4519): message :             _SizeT=unsigned int
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(4519): message :         ]
1>E:\college\numBaseTest\numBaseTest\numBaseTest\intBase.cpp(104): message : see reference to function template instantiation 'std::basic_ostream<char,std::char_traits<char>> &std::operator <<<char,std::char_traits<char>,std::allocator<char>>(std::basic_ostream<char,std::char_traits<char>> &,const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &)' being compiled
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(435,1): error C2065: 'iostate': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(435,31): error C2146: syntax error: missing ';' before identifier '_State'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(435,31): error C2065: '_State': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(435,49): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(435,1): error C2065: 'goodbit': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(438,1): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(441,1): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(444,29): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(444,1): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(444,36): error C2146: syntax error: missing ';' before identifier '_Ok'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(444,36): error C3861: '_Ok': identifier not found
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(446,10): error C2065: '_Ok': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(447,9): error C2065: '_State': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(447,28): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(447,1): error C2065: 'badbit': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(450,1): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(450,39): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(450,1): error C2065: 'adjustfield': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(450,64): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(450,1): error C2065: 'left': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(452,1): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(452,1): error C2660: 'std::_Narrow_char_traits<char,int>::eq_int_type': function does not take 1 arguments
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(401,38): message : see declaration of 'std::_Narrow_char_traits<char,int>::eq_int_type'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(453,21): error C2065: '_State': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(453,40): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(453,1): error C2065: 'badbit': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(459,13): error C2065: '_State': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(459,32): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(459,1): error C2065: 'goodbit': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(460,1): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(461,13): error C2065: '_State': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(461,32): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(461,1): error C2065: 'badbit': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(464,1): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(464,1): error C2660: 'std::_Narrow_char_traits<char,int>::eq_int_type': function does not take 1 arguments
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(401,38): message : see declaration of 'std::_Narrow_char_traits<char,int>::eq_int_type'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(465,21): error C2065: '_State': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(465,40): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(465,1): error C2065: 'badbit': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(471,1): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(472,1): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(472,9): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(472,1): error C2065: 'badbit': undeclared identifier
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(475,1): error C2027: use of undefined type 'std::basic_ostream<char,std::char_traits<char>>'
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\iosfwd(216): message : see declaration of 'std::basic_ostream<char,std::char_traits<char>>'
1>test.cpp
1>Generating Code...
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xstring(475,20): error C2065: '_State': undeclared identifier
1>Done building project "numBaseTest.vcxproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========


#pragma once
#include <sstream>
#include <string>
#include <cmath>