VS C++ 线程篇之二创建线程（传递参数）

例程1：传递整型参数

#include 
#include 
#include 


DWORD WINAPI ThreadProFunc(LPVOID lpParam);

int main(int argc, char **argv)
{
	HANDLE hThread;
	DWORD dwThreadId;
	int param = 20;
	hThread = CreateThread( NULL, NULL, ThreadProFunc, ¶m , 0, &dwThreadId);

	CloseHandle(hThread);	//关闭线程句柄

	system("pause");
	return 0;
}

DWORD WINAPI ThreadProFunc(LPVOID lpParam)
{
	printf("param = %d\n", *(int*)lpParam);
	return 0;
}

运行结果：

param = 20
请按任意键继续. . .

例程2：传递字符串

#include 
#include 
#include 


DWORD WINAPI ThreadProFunc(LPVOID lpParam);

int main(int argc, char **argv)
{
	HANDLE hThread;
	DWORD dwThreadId;
	char param[] = "hello";
	hThread = CreateThread( NULL, NULL, ThreadProFunc, param, 0, &dwThreadId);

	CloseHandle(hThread);	//关闭线程句柄

	system("pause");
	return 0;
}

DWORD WINAPI ThreadProFunc(LPVOID lpParam)
{
	printf("param = %s\n", (char*)lpParam);
	return 0;
}

运行结果

param = hello
请按任意键继续. . .

例程3：传递结构体参数

#include 
#include 
#include 

typedef struct {
	int x;
	int y;
}Coord;

DWORD WINAPI ThreadProFunc(LPVOID lpParam);

int main(int argc, char **argv)
{
	HANDLE hThread;
	DWORD dwThreadId;
	Coord param = {10, 20};
	hThread = CreateThread( NULL, NULL, ThreadProFunc, ¶m , 0, &dwThreadId);

	CloseHandle(hThread);	//关闭线程句柄

	system("pause");
	return 0;
}

DWORD WINAPI ThreadProFunc(LPVOID lpParam)
{
	printf("x = %d, y = %d\n", ((Coord*)lpParam)->x, (*(Coord*)lpParam)->y);
	return 0;
}

运行结果

x = 10, y = 20
请按任意键继续. . .

例程4：传递对象（C++内置对象）

#include 
#include 
#include 
#include 
#include 
using namespace std;


DWORD WINAPI ThreadProFunc(LPVOID lpParam);


int main(int argc, char **argv)
{
	HANDLE hThread;
	DWORD dwThreadId;
	string str = "hello world";
	//string *pStr = new string("nihao");
	hThread = CreateThread( NULL, NULL, ThreadProFunc, &str, 0, &dwThreadId);


	CloseHandle(hThread);	//关闭线程句柄


	system("pause");
	return 0;
}


DWORD WINAPI ThreadProFunc(LPVOID lpParam)
{
	cout << *(string*)lpParam << endl;    // string 内置对象使用std::cout打印，printf不能直接打印
	return 0;
}

运行结果

hello world
请按任意键继续. . .

例程4：传递对象（C++自定义对象）

#include 
#include 
#include 
#include 
#include 
using namespace std;

class Coord {
public:
	Coord(int x, int y)
	{
		m_iX = x; 
		m_iY = y;
	}
	~Coord(){};
	void printInfo()
	{
		printf("coord(%d,%d)\n", m_iX, m_iY);
	}
private:
	int m_iX;
	int m_iY;
};

DWORD WINAPI ThreadProFunc(LPVOID lpParam);

int main(int argc, char **argv)
{
	HANDLE hThread;
	DWORD dwThreadId;

	Coord var(10,20);
	hThread = CreateThread( NULL, NULL, ThreadProFunc, &var, 0, &dwThreadId);

	CloseHandle(hThread);	//关闭线程句柄

	system("pause");
	return 0;
}

DWORD WINAPI ThreadProFunc(LPVOID lpParam)
{
	((Coord*)lpParam)->printInfo();
	return 0;
}

运行结果

coord(10,20)
请按任意键继续. . .