c语言时间片轮转调度算法与银行家算法结合，设计一种时间片轮转调度算法从进程就绪队列中选择一个进程，该进程发出资源请求并启动银行家算法代码

以下是时间片轮转调度算法与银行家算法结合的示例代码：

#include <stdio.h>
#include <stdlib.h>

#define MAX_PROCESS 10
#define MAX_RESOURCE 5
#define QUANTUM 10

// 进程结构体
typedef struct {
    int pid; // 进程 ID
    int priority; // 进程优先级
    int request[MAX_RESOURCE]; // 进程资源请求
    int allocated[MAX_RESOURCE]; // 进程已分配资源
    int need[MAX_RESOURCE]; // 进程需要的资源
    int completed; // 进程是否完成
} process;

// 银行家算法函数
int banker(process *processes, int *available, int n_process, int n_resource) {
    int work[MAX_RESOURCE], finish[MAX_PROCESS], sequence[MAX_PROCESS], i, j;
    int count = 0, safe = 1;
    for (i = 0; i < n_process; i++) {
        finish[i] = 0;
    }
    for (i = 0; i < n_resource; i++) {
        work[i] = available[i];
    }
    while (count < n_process) {
        safe = 0;
        for (i = 0; i < n_process; i++) {
            if (!finish[i]) {
                int can_allocate = 1;
                for (j = 0; j < n_resource; j++) {
                    if (processes[i].need[j] > work[j]) {
                        can_allocate = 0;
                        break;
                    }
                }
                if (can_allocate) {
                    for (j = 0; j < n_resource; j++) {
                        work[j] += processes[i].allocated[j];
                    }
                    finish[i] = 1;
                    sequence[count++] = i;
                    safe = 1;
                }
            }
        }
        if (!safe) {
            break;
        }
    }
    if (count == n_process) {
        printf("\nSafe sequence:");
        for (i = 0; i < n_process; i++) {
            printf(" P%d", sequence[i]);
        }
        return 1;
    } else {
        printf("\nUnsafe state");
        return 0;
    }
}

// 时间片轮转调度算法函数
void rr(process *processes, int n_process, int n_resource, int *available) {
    int time_quantum = QUANTUM;
    int i, j, k, flag;
    while (1) {
        flag = 1;
        for (i = 0; i < n_process; i++) {
            if (!processes[i].completed) {
                flag = 0;
                if (processes[i].priority >= time_quantum) {
                    processes[i].priority -= time_quantum;
                    time_quantum = QUANTUM;
                    int can_allocate = 1;
                    for (j = 0; j < n_resource; j++) {
                        if (processes[i].request[j] > available[j]) {
                            can_allocate = 0;
                            break;
                        }
                    }
                    if (can_allocate) {
                        for (j = 0; j < n_resource; j++) {
                            available[j] -= processes[i].request[j];
                            processes[i].allocated[j] += processes[i].request[j];
                            processes[i].need[j] -= processes[i].request[j];
                        }
                        if (banker(processes, available, n_process, n_resource)) {
                            processes[i].completed = 1;
                        } else {
                            for (j = 0; j < n_resource; j++) {
                                available[j] += processes[i].allocated[j];
                                processes[i].allocated[j] = 0;
                                processes[i].need[j] += processes[i].request[j];
                            }
                        }
                    }
                } else {
                    time_quantum -= processes[i].priority;
                    processes[i].priority = 0;
                }
            }
        }
        if (flag) {
            break;
        }
    }
}

int main() {
    int n_process, n_resource, i, j;
    printf("Enter the number of processes: ");
    scanf("%d", &n_process);
    printf("Enter the number of resources: ");
    scanf("%d", &n_resource);
    process processes[MAX_PROCESS];
    int available[MAX_RESOURCE];
    for (i = 0; i < n_resource; i++) {
        printf("Enter the number of available instances of resource %d: ", i + 1);
        scanf("%d", &available[i]);
    }
    for (i = 0; i < n_process; i++) {
        processes[i].pid = i;
        printf("Enter the priority of process %d: ", i);
        scanf("%d", &processes[i].priority);
        for (j = 0; j < n_resource; j++) {
            printf("Enter the maximum number of instances of resource %d required by process %d: ", j + 1, i);
            scanf("%d", &processes[i].need[j]);
            printf("Enter the number of instances of resource %d allocated to process %d: ", j + 1, i);
            scanf("%d", &processes[i].allocated[j]);
        }
        processes[i].completed = 0;
    }
    rr(processes, n_process, n_resource, available);
    return 0;
}

在以上代码中，我们先定义了一个 process 结构体来存储每个进程的信息，包括进程 ID、优先级、资源请求、已分配资源、需要的资源和是否完成。然后我们定义了一个 banker 函数来实现银行家算法，这个函数会遍历所有进程，并计算每个进程是否可以分配资源。如果所有进程都能获得所需的资源，则说明系统处于安全状态，函数会打印出一个安全序列。否则，函数会打印出一个不安全状态。

接下来，我们定义了一个 rr 函数来实现时间片轮转调度算法。这个函数会循环遍历所有进程，并根据每个进程的优先级来决定是否分配时间片。如果进程需要请求资源，则会调用 banker 函数来判断当前系统是否处于安全状态。如果是，则分配资源，并将进程标记为已完成；否则，不分配资源。

最后，在 main 函数中，我们先读入所有进程和资源的信息，然后调用 rr 函数来执行时间片轮转调度算法。