我正在尝试使用XOR方法制作加密器/解密器。 我以前在Console C ++中做过这个，我是VC ++的新手，所以我希望你能帮助我。 加密的工作方式如下：
key = 3
x = 5 // The item being encrypted
encryptedx = x ^ key // the "^" is XOR
所以现在，我想在VC ++中创建它，使其看起来更好于Console窗口。 在VC ++的设计视图中，我有两个富文本框，键编辑框和一些按钮来启动该过程。 这听起来很容易，但我收到了这些错误：
------ Build started: Project: Encryptor, Configuration: Debug Win32 ------
1> Encryptor.cpp
1>c:\users\**********c*********ncryptor\encryptor\Form1.h(264): error C2679: binary '=' : no operator found which takes a right-hand operand of type 'System::String ^' (or there is no acceptable conversion)
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(707): could be 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator =(std::basic_string<_Elem,_Traits,_Ax> &&)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ax=std::allocator<char>
1> ]
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(762): or 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator =(const std::basic_string<_Elem,_Traits,_Ax> &)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ax=std::allocator<char>
1> ]
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(767): or 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator =(const _Elem *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ax=std::allocator<char>
1> ]
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(772): or 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator =(_Elem)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ax=std::allocator<char>
1> ]
1> while trying to match the argument list '(std::string, System::String ^)'
1>c:\*******gl\*****cryptor\encryptor\Form1.h(281): error C2679: binary '=' : no operator found which takes a right-hand operand of type 'System::String ^' (or there is no acceptable conversion)
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(707): could be 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator =(std::basic_string<_Elem,_Traits,_Ax> &&)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ax=std::allocator<char>
1> ]
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(762): or 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator =(const std::basic_string<_Elem,_Traits,_Ax> &)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ax=std::allocator<char>
1> ]
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(767): or 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator =(const _Elem *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ax=std::allocator<char>
1> ]
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(772): or 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator =(_Elem)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ax=std::allocator<char>
1> ]
1> while trying to match the argument list '(std::string, System::String ^)'
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
以下是代码：
#include <string>
#include "crypFunc.cpp"
int key = 0;
char tempChar;
int stringLenght = 0;
string strBuffer = "";
using namespace std;
//
//
//
//
//
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e)
{
if(KeyBox->Text)
{
key =Convert::ToInt32(KeyBox->Text);
numericUpDown1->Value = key;
}
}
//
//
//
//
private: System::Void EncryptButton_Click(System::Object^ sender, System::EventArgs^ e)
{
EncryptedBox->Text = "";
strBuffer = DecryptedBox->Text;
stringLenght = strBuffer.size();
if( strBuffer.size() && key)
{
for(int i = 0; i < stringLenght; i++)
{
tempChar = encrypt(strBuffer[i], key);
EncryptedBox->Text = EncryptedBox->Text + tempChar;
}
}
}
private: System::Void DecryptButton_Click(System::Object^ sender, System::EventArgs^ e)
{
DecryptedBox->Text = "";
strBuffer = Convert::ToString(EncryptedBox->Text);
stringLenght = strBuffer.size();
if( strBuffer.size() && key)
{
for(int i = 0; i < stringLenght; i++)
{
tempChar = decrypt(strBuffer[i], key);
DecryptedBox->Text = DecryptedBox->Text + tempChar;
}
}
}
};
}
我真的希望你们中的一些人可以帮助我。
答案 0 :(得分：1)
看起来您正在尝试将托管的System :: String ^对象分配给std :: string。您需要首先转换System :: String：
http://msdn.microsoft.com/en-us/library/1b4az623(v=vs.80).aspx
另外，请注意，这不仅仅是标准的“VC ++”。您的代码是C ++ / CLI（如果您正在尝试这样做，可能会很好）。
希望这有帮助。
答案 1 :(得分：1)
对于VS2008及更高版本，您可以使用marshal_as。否则，请参阅@ Scott的答案。
#include <msclr/marshal_cppstd.h>
String^ foo = "";
std::string bar = marshal_as<std::string>(foo);
答案 2 :(得分：0)
好的，我已经回家了，为你尝试了一些东西。
我在我的机器上运行此代码没问题。汇总了一个关于如何从std :: string转换为system :: String ^以及从system :: string ^转换为std :: string的小演示。
在阅读时，似乎这不是从std :: string到system :: string ^的最好主意。如果你愿意，你可以阅读它。
您还需要将公共语言运行时支持设置为/ clr。祝你好运，希望这有帮助！
#include <string>
#include <iostream>
#include <msclr\marshal.h>
#include <msclr\marshal_cppstd.h> // you will only need one of these
using namespace std;
using namespace System;
using namespace msclr::interop;
int main() {
//define our std::string
string standardString = "Test String to Marshal";
cout << "String before conversions: " << standardString<<endl;
// convert std::string to system::string^ using marshalling
String^ sysStringFromStandardString;
sysStringFromStandardString = marshal_as<String^>( standardString );
// convert system::string^ to std::string
string backToStdString;
backToStdString = marshal_as<string>(sysStringFromStandardString);
cout<< "String after converstion: "<<backToStdString<<endl;
return 0;
}