以下是用 C 语言实现的代码: ```c #include <stdio.h> #include <stdlib.h> // 定义分区结构体 typedef struct Partition { int start; // 起始地址 int size; // 容量 } Partition; // 初始化分区数组 Partition* initPartitions(int n) { Partition* partitions = (Partition*)malloc(n * sizeof(Partition)); if (partitions == NULL) { printf("内存分配失败\n"); return NULL; } return partitions; } // 释放分区数组内存 void freePartitions(Partition* partitions, int n) { free(partitions); } // 打印空闲分区个数 void printFreePartitionCount(int count) { printf("%d\n", count); } // 回收进程占用的分区 int recyclePartition(Partition* partitions, int n, char* recycleProcesses) { int count = 0; // 空闲分区个数 char* token = strtok(recycleProcesses, " "); while (token!= NULL) { int found = 0; // 标记是否找到要回收的进程 for (int i = 0; i < n; i++) { if (partitions[i].start == 0 && partitions[i].size == 0) { continue; // 跳过已回收的分区 } if (strcmp(token, "p") == 0 + i + 1) { // 比较进程编号 partitions[i].start = 0; partitions[i].size = 0; found = 1; break; } } if (!found) { return -1; // 回收的进程不存在 } token = strtok(NULL, " "); } // 计算空闲分区个数 for (int i = 0; i < n; i++) { if (partitions[i].start == 0 && partitions[i].size == 0) { count++; } } return count; } int main() { int n; scanf("%d", &n); Partition* partitions = initPartitions(n); for (int i = 0; i < n; i++) { scanf("%d %d", &partitions[i].start, &partitions[i].size); } char recycleProcesses[100]; scanf("%s", recycleProcesses); int freeCount = recyclePartition(partitions, n, recycleProcesses); if (freeCount == -1) { printf("false\n"); } else { printFreePartitionCount(freeCount); } freePartitions(partitions, n); return 0; } ``` 额外需要注意的逻辑点: 1. 输入数据的合法性检查,比如起始地址和存储容量是否为正数。 2. 处理回收进程不存在的情况,确保输出的结果准确。 3. 对于分区的合并操作,如果相邻分区都空闲,考虑进行合并以优化内存管理。 [2024-11-21 16:41:39 | AI写代码神器 | 721点数解答]