C语言实现4进程SRTF调度算法，输出执行顺序

好的，下面是一个使用C语言实现的程序，它会根据输入的4个进程信息，按照最短剩余时间优先（SRTF）调度算法进行调度，并输出各个进程的执行顺序。 ```c #include <stdio.h> #include <stdlib.h> #include <string.h> typedef struct { char name[11]; int arrival_time; int burst_time; int remaining_time; int start_time; int finish_time; } Process; int compare(const void *a, const void *b) { Process *p1 = (Process *)a; Process *p2 = (Process *)b; return p1->arrival_time - p2->arrival_time; } void srtf_schedule(Process processes[], int n) { int time = 0, completed = 0; int current = -1; while (completed < n) { int min_remaining_time = 99999; int next_process = -1; for (int i = 0; i < n; i++) { if (processes[i].arrival_time <= time && processes[i].remaining_time > 0) { if (processes[i].remaining_time < min_remaining_time) { min_remaining_time = processes[i].remaining_time; next_process = i; } else if (processes[i].remaining_time == min_remaining_time) { if (processes[i].arrival_time < processes[next_process].arrival_time) { next_process = i; } } } } if (next_process == -1) { time++; continue; } if (current != next_process) { if (current != -1) { printf("%s ", processes[current].name); } processes[next_process].start_time = time; current = next_process; } processes[next_process].remaining_time--; time++; if (processes[next_process].remaining_time == 0) { processes[next_process].finish_time = time; completed++; if (completed == n) { printf("%s\n", processes[next_process].name); } } } } int main() { Process processes[4]; for (int i = 0; i < 4; i++) { printf("Enter process %d name (max 10 chars): ", i + 1); scanf("%s", processes[i].name); printf("Enter process %d arrival time: ", i + 1); scanf("%d", &processes[i].arrival_time); printf("Enter process %d burst time: ", i + 1); scanf("%d", &processes[i].burst_time); processes[i].remaining_time = processes[i].burst_time; } qsort(processes, 4, sizeof(Process), compare); printf("Process execution order: "); srtf_schedule(processes, 4); return 0; } ``` 解释 1. 结构体定义：定义了一个 `Process` 结构体，包含进程名、到达时间、所需运行时间、剩余运行时间、开始时间和完成时间。 2. 比较函数：`compare` 函数用于按到达时间对进程进行排序。 3. SRTF调度函数：`srtf_schedule` 函数实现了最短剩余时间优先调度算法。 4. 主函数： - 读取4个进程的信息。 - 按到达时间对进程进行排序。 - 调用 `srtf_schedule` 函数进行调度并输出执行顺序。 这个程序会按要求读取4个进程的信息，并按照SRTF调度算法输出各个进程的执行顺序。希望这对你有帮助！ ######[AI写代码神器 | 803点数解答 | 2024-11-08 10:43:55]