在windows环境下用c语言编写睡眠理发师问题要求可以从键盘输入理发师和顾客数量

好的，我们可以使用Windows API中的信号量来实现进程之间的同步。

首先，定义三个信号量：chair，barber和customer。chair表示等待的椅子数量，barber表示理发师是否在工作，customer表示等待的顾客数量。

初始化chair的值为n，barber和customer的值为0。

然后，我们可以使用CreateProcess函数创建两个进程：理发师进程和顾客进程。通过使用GetStdHandle函数获取标准输入，从键盘输入理发师和顾客数量。

理发师进程的代码如下：

HANDLE chair, barber, customer;

// 初始化三个信号量
chair = CreateSemaphore(NULL, n, n, NULL);
barber = CreateSemaphore(NULL, 0, 1, NULL);
customer = CreateSemaphore(NULL, 0, 1, NULL);

while (true) {
    WaitForSingleObject(customer, INFINITE); // 等待顾客
    WaitForSingleObject(chair, INFINITE); // 占用一把等待椅子
    ReleaseSemaphore(barber, 1, NULL); // 叫醒理发师
    // 理发师理发
    ReleaseSemaphore(chair, 1, NULL); // 释放等待椅子
}

顾客进程的代码如下：

HANDLE chair, barber, customer;
int num_barbers, num_customers;

// 初始化三个信号量
chair = CreateSemaphore(NULL, n, n, NULL);
barber = CreateSemaphore(NULL, 0, 1, NULL);
customer = CreateSemaphore(NULL, 0, 1, NULL);

while (true) {
    WaitForSingleObject(chair, INFINITE); // 占用一把等待椅子
    if (WaitForSingleObject(barber, 0) == WAIT_OBJECT_0) { // 理发师在睡觉
        ReleaseSemaphore(customer, 1, NULL); // 叫醒理发师
        WaitForSingleObject(barber, INFINITE); // 等待理发师准备好
        // 理发师理发
        ReleaseSemaphore(chair, 1, NULL); // 释放等待椅子
    } else { // 理发师在工作
        ReleaseSemaphore(chair, 1, NULL); // 释放等待椅子
    }
}

完整代码如下：

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

#define MAX_CUSTOMERS 1000

int main() {
    HANDLE chair, barber, customer;
    int num_barbers, num_customers;

    printf("请输入理发师数量：");
    scanf_s("%d", &num_barbers);

    printf("请输入顾客数量：");
    scanf_s("%d", &num_customers);

    if (num_barbers < 1 || num_customers < 1 || num_customers > MAX_CUSTOMERS) {
        printf("输入有误！\n");
        return 1;
    }

    // 初始化三个信号量
    chair = CreateSemaphore(NULL, num_customers, num_customers, NULL);
    barber = CreateSemaphore(NULL, 0, num_barbers, NULL);
    customer = CreateSemaphore(NULL, 0, num_customers, NULL);

    // 创建理发师进程
    for (int i = 0; i < num_barbers; i++) {
        STARTUPINFO si;
        PROCESS_INFORMATION pi;

        ZeroMemory(&si, sizeof(si));
        si.cb = sizeof(si);
        ZeroMemory(&pi, sizeof(pi));

        TCHAR cmdLine[] = TEXT("barber.exe");

        if (!CreateProcess(NULL, cmdLine, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi)) {
            printf("创建进程失败！\n");
            return 1;
        }
    }

    // 创建顾客进程
    for (int i = 0; i < num_customers; i++) {
        STARTUPINFO si;
        PROCESS_INFORMATION pi;

        ZeroMemory(&si, sizeof(si));
        si.cb = sizeof(si);
        ZeroMemory(&pi, sizeof(pi));

        TCHAR cmdLine[] = TEXT("customer.exe");

        if (!CreateProcess(NULL, cmdLine, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi)) {
            printf("创建进程失败！\n");
            return 1;
        }
    }

    // 等待进程结束
    WaitForSingleObject(GetCurrentProcess(), INFINITE);

    // 关闭信号量句柄
    CloseHandle(chair);
    CloseHandle(barber);
    CloseHandle(customer);

    return 0;
}

理发师进程的代码：

#include <Windows.h>

int main() {
    HANDLE chair, barber, customer;

    // 打开三个信号量
    chair = OpenSemaphore(SEMAPHORE_ALL_ACCESS, FALSE, NULL);
    barber = OpenSemaphore(SEMAPHORE_ALL_ACCESS, FALSE, NULL);
    customer = OpenSemaphore(SEMAPHORE_ALL_ACCESS, FALSE, NULL);

    while (true) {
        WaitForSingleObject(customer, INFINITE); // 等待顾客
        WaitForSingleObject(chair, INFINITE); // 占用一把等待椅子
        ReleaseSemaphore(barber, 1, NULL); // 叫醒理发师
        // 理发师理发
        ReleaseSemaphore(chair, 1, NULL); // 释放等待椅子
    }

    // 关闭信号量句柄
    CloseHandle(chair);
    CloseHandle(barber);
    CloseHandle(customer);

    return 0;
}

顾客进程的代码：

#include <Windows.h>

int main() {
    HANDLE chair, barber, customer;

    // 打开三个信号量
    chair = OpenSemaphore(SEMAPHORE_ALL_ACCESS, FALSE, NULL);
    barber = OpenSemaphore(SEMAPHORE_ALL_ACCESS, FALSE, NULL);
    customer = OpenSemaphore(SEMAPHORE_ALL_ACCESS, FALSE, NULL);

    while (true) {
        WaitForSingleObject(chair, INFINITE); // 占用一把等待椅子
        if (WaitForSingleObject(barber, 0) == WAIT_OBJECT_0) { // 理发师在睡觉
            ReleaseSemaphore(customer, 1, NULL); // 叫醒理发师
            WaitForSingleObject(barber, INFINITE); // 等待理发师准备好
            // 理发师理发
            ReleaseSemaphore(chair, 1, NULL); // 释放等待椅子
        } else { // 理发师在工作
            ReleaseSemaphore(chair, 1, NULL); // 释放等待椅子
        }
    }

    // 关闭信号量句柄
    CloseHandle(chair);
    CloseHandle(barber);
    CloseHandle(customer);

    return 0;
}