要求實現：

• 用命名管道的相關知識及函數，分別編寫服務器進程和客戶端進程程序。
• 要求服務器進程和客戶端進程程序能夠通過互相傳送數據。
• 當服務器進程和客戶端進程中的任何一端輸入“end”時，結束會話。

寫了半天，發現如果只用單個管道的話，非常的困難，進程總是卡住，感覺難點在於服務器進程怎麽主動地像客戶端進程發送信息，研究了一天還是未解決這個問題。。。

最後是寫了個雙管道的(每個進程都有各自的服務器和客戶端)來實現的，雖然和要求可能有所出入。。。

#include <Windows.h>
#include <stdio.h>

HANDLE hPipe, hInput;
 
char writeBuffer[256];
char readBuffer[256];
DWORD cbRead = 100;
BOOL isSelf = false;
BOOL fConnected = false;
BOOL isExit = false;

DWORD WINAPI mThreadFunc(LPVOID lpParam)
{
    while (true)
    {
        gets_s(writeBuffer, 256);
        if (WaitNamedPipe("\\\\.\\pipe\\test2", 1000))
        {
            CallNamedPipe(
                
 
"\\\\.\\pipe\\test2", 
                writeBuffer, 
                256, 
                readBuffer, 
                256, 
                &cbRead, 
                20000);
            printf("%s\n", readBuffer);
            if (strcmp(writeBuffer, "end") == 0)
            {
                exit(-1
 
);
            }
        }
        else
        {
            if (GetLastError() == ERROR_FILE_NOT_FOUND)
            {
                printf("錯誤：進程二沒在運行！\n");
            }
        }

    }
}

int main()
{
    printf("我是進程一。\n\n");

    hPipe = CreateNamedPipe(
        "\\\\.\\pipe\\test1",
        PIPE_ACCESS_DUPLEX,
        PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT,
        3,
        512,
        512,
        0,
        NULL);

    hInput = CreateThread(NULL, 0, mThreadFunc, NULL, 0, NULL);
    CloseHandle(hInput);

    while (!isExit)
    {
        fConnected = ConnectNamedPipe(hPipe, NULL) ?
            TRUE : (GetLastError() == ERROR_PIPE_CONNECTED);
        if (fConnected)
        {
            ReadFile(hPipe, readBuffer, 256, 0, NULL);       
            printf("進程二: %s\n", readBuffer);
            WriteFile(hPipe, "進程一: 我收到了！", 256, 0, NULL);
            DisconnectNamedPipe(hPipe);
            if (strcmp(readBuffer, "end") == 0)
            {
                isExit = true;
            }
        }
    }

    CloseHandle(hPipe);

    return 0;
}

#include <Windows.h>
#include <stdio.h>

HANDLE hPipe, hInput;
char writeBuffer[256];
char readBuffer[256];
DWORD cbRead = 100;
BOOL isSelf = false;
BOOL fConnected = false;
BOOL isExit = false;

DWORD WINAPI mThreadFunc(LPVOID lpParam)
{
    while (true)
    {
        gets_s(writeBuffer, 256);
        if (WaitNamedPipe("\\\\.\\pipe\\test1", 1000))
        {
            CallNamedPipe(
                "\\\\.\\pipe\\test1",
                writeBuffer,
                256,
                readBuffer,
                256,
                &cbRead,
                20000);
            printf("%s\n", readBuffer);
            if (strcmp(writeBuffer, "end") == 0)
            {
                exit(-1);
            }
        }
        else
        {
            if (GetLastError() == ERROR_FILE_NOT_FOUND)
            {
                printf("錯誤：進程一沒在運行！");
            }
        }
    }
}

int main()
{
    printf("我是進程二。\n\n");

    hPipe = CreateNamedPipe(
        "\\\\.\\pipe\\test2",
        PIPE_ACCESS_DUPLEX,
        PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT,
        3,
        512,
        512,
        0,
        NULL);

    hInput = CreateThread(NULL, 0, mThreadFunc, NULL, 0, NULL);
    CloseHandle(hInput);

    while (!isExit)
    {
        fConnected = ConnectNamedPipe(hPipe, NULL) ?
            TRUE : (GetLastError() == ERROR_PIPE_CONNECTED);
        if (fConnected)
        {
            ReadFile(hPipe, readBuffer, 256, 0, NULL);
            printf("進程一: %s\n", readBuffer);
            WriteFile(hPipe, "進程二: 我收到了！", 256, 0, NULL);
            DisconnectNamedPipe(hPipe);
            if (strcmp(readBuffer, "end") == 0)
            {
                isExit = true;
            }
        }
    }

    CloseHandle(hPipe);

    return 0;
}

C winapi 進程間通信(Named Pipe)。