基本類型	System命名空間中對應的類	注釋/用法
bool	System::Boolean	bool dirty = false;
char	System::SByte	char sp = ' ';
signed char	System::SByte	signed char ch = -1;
unsigned char	System::Byte	unsigned char ch = '\0';
wchar_t	System::Char	wchar_t wch = ch;
short	System::Int16	short s = ch;
unsigned short	System::UInt16	unsigned short s = 0xffff;
int	System::Int32	int ival = s;
unsigned int	System::UInt32	unsigned int ui = 0xffffffff;
long	System::Int32	long lval = ival;
unsigned long	System::UInt32	unsigned long ul = ui;
long long	System::Int64	long long etime = ui;
unsigned long long	System::UInt64	unsigned long long mtime = etime;
float	System::Single	float f = 3.14f;
double	System::Double	double d = 3.14159;
long double	System::Double	long double d = 3.14159L;

字符串

字符串CLI已經(jīng)內(nèi)置了：System::String，但C++的常用字符串有char*、wchar_t*、std::string等好多種，編譯器提供了char*、wchar_t*到System::String的自動轉換：

System::String^ s = "hello worold";
System::String^ s2 = L"hello worold";

另外，也可以使用gcnew創(chuàng)建托管字符串：

System::String^ s = gcnew String("hello worold");

但是，對于System::String轉char*，系統(tǒng)沒有直接的語法支持。方法有很多種，我通常使用如下方式來轉換：

IntPtr ip = Marshal::StringToHGlobalAnsi(str);
const char* ch = static_cast<const char*>(ip.ToPointer());
//do something with ch
Marshal::FreeHGlobal(ip);

這里有個需要注意的地方是在使用完轉換出來的const char*后需要釋放掉轉換過程中的Intptr，如果沒有太多需要考慮性能的地方，大可以使用一個std::string將其拷貝走，寫成如下函數(shù)形式：

    #include <string>

    using namespace std;
    using namespace System;
    using namespace System::Runtime::InteropServices;

    string cast_to_string(String^ str)
    {
        IntPtr ip = Marshal::StringToHGlobalAnsi(str);
        const char* ch = static_cast<const char*>(ip.ToPointer());
        string stdStr = ch;
        Marshal::FreeHGlobal(ip);

        return stdStr;
    }

參考文章：如何：使用 C++ 互操作封送 ANSI 字符串