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, 3, 0 18.1. #+5. Triangle.h

#ifndef __TRIANGLE_H__ #define __TRIANGLE_H__

double Gip(double a, double b); double Area(double a, double b);

#endif

, 3, 0 18.2. #+5. Triangle.cpp

#include "stdafx.h" #include <cmath>

//I e % I % Q Q. double Gip(double a, double b)

{

return sqrt(a*a + b*b);

}

//I e % e !Q % Q Q. double Area(double a, double b)

{

return a*b/2.0;

}

224

, 3, 0 18.3. #+5. Tria2.cpp

#include "stdafx.h" #include "Triangle.h"

// š !, 9 Q ! ! K L Gip Area void _tmain()

{

double a = 2.0, b = 3.0;

cout << Gip(a, b) << endl; cout << Area(a, b) << endl; system("pause");

}

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, 3, 0 18.4. #+5. Tria3.cpp

#include "stdafx.h" #include "triangle.h"

// ! : L Tria.lib. #pragma comment(lib,"Tria.lib")

void _tmain()

{

std::cout << Gip(2., 3.) << std::endl; std::cout << Area(2., 3.) << std::endl;

}

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, 3, 0 18.5. #+5. Triangle.h

#ifndef __TRIANGLE_H__ #define __TRIANGLE_H__

//extern "C" _declspec(dllexport) - _ I, K

//! _% Q -K L % J.

extern "C" __declspec(dllexport) double Gip(double a, double b); extern "C" __declspec(dllexport) double Area(double a, double b);

#endif

227

, 3, 0 18.6. #+5. Triangle.cpp

#include "stdafx.h" #include <cmath>

// J % e !Q.

extern "C" __declspec(dllexport) double Area(double a, double b)

{

return a*b/2.0;

}

// J % I .

extern "C" __declspec(dllexport) double Gip(double a, double b)

{

return ::sqrt(a*a + b*b);

}

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, 3, 0 18.7. #+5. Tria4.cpp

#include "stdafx.h"

#include <windows.h> // ( % K L Windows. #include <iostream>

#include <locale>

// I! % I Q K functionDll. typedef double(*functionDll)( double, double);

using namespace std;

// ! : L Triangl.lib. #pragma comment(lib,"Triangl.lib")

void _tmain()

228

{

// ( J % e ! I 9 DLL % Q. hDllInstance = LoadLibrary(_T("Triangl.dll")); if(hDllInstance) // I I dll % ;.

{

// I Q K : Area. fpFunction =

(functionDll)GetProcAddress(hDllInstance,"Area");

if(fpFunction) // I I K % ;.

{

}

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