实例编程：C++动态链接实验

 
// ifaststring.h///////////////////

class _declspec(dllexport)IFastString
{
public:
virtual void Delete(void) = 0;
virtual int Length(void) = 0;
virtual int Find(const char *psz) = 0;
};

extern "C"
IFastString *CreateFastString(const char *psz);
////////////////////////////////////////////////////////////

// ifaststring.h ///////////////////

#include"ifaststring.h"

class FastString:public IFastString
{
private:
const int m_cch; //number of character
char *m_psz;
public:
FastString(const char *psz);
~FastString(void);
int Length(void);
int Find(const char *psz);
void Delete(void);
};
/////////////////////////////////////////

// faststring.cpp//////////////////////
#include<string>
#include"faststring.h"

IFastString *CreateFastString(const char *psz)
{
return new FastString(psz);
}

FastString::FastString(const char* psz):m_cch(strlen(psz)),
m_psz(new char[strlen(psz)+1])
{
strcpy(m_psz, psz);
}

FastString::~FastString(void)
{
delete[] m_psz;
}

void FastString::Delete(void)
{
delete this;
}

int FastString::Length(void)
{
return m_cch;
}

int FastString::Find(const char *psz) //the function is not complete
{
return 1;
}

///////////////////////////////////////////////////////////////////////////

// mainTest.cpp////////////
#include"ifaststring.h"
#include<iostream>

using namespace std;

int f(void)
{
int n = -1;
IFastString *pfs = CreateFastString("Hi Bob");
if( pfs->Find("g") )
{
cout<<" test success! "<<endl ;
}
return 2;
}

int main( )
{
int m;
m = f();
cout<<m;

return 0;
}
////////////////////////////////////////////