用C语言写志愿者服务活动管理系统设计并带解释 志愿者服务活动信息包括：志愿者姓名、电话、志愿者参加的服务活动名称、地点、内容等。试设计一个志愿者服务活动信息管理系统，使之能提供以下功能： 1. 系统以菜单方式工作，可以循环显示菜单，直至选择退出系统，才结束整个程序的运行。 2. 志愿者服务活动信息录入功能（志愿者服务活动信息用文件保存）。 3. 志愿者服务活动信息浏览功能。 4. 志愿者服务活动信息查询功能。 实现两种查询方式： 按志愿者姓名查询。 按手机号查询。 5. 志愿者服务活动信息的删除与修改。 语言方向：C 系统环境：Windows

```c #include <stdio.h> #include <stdlib.h> #include <string.h> // 定义志愿者服务活动结构体 typedef struct VolunteerActivity { char name[50]; char phone[20]; char activityName[50]; char location[50]; char content[100]; } VolunteerActivity; // 录入志愿者服务活动信息 void inputActivity(VolunteerActivity *activity) { printf("请输入志愿者姓名: "); scanf("%s", activity->name); printf("请输入志愿者电话: "); scanf("%s", activity->phone); printf("请输入志愿者参加的服务活动名称: "); scanf("%s", activity->activityName); printf("请输入活动地点: "); scanf("%s", activity->location); printf("请输入活动内容: "); scanf("%s", activity->content); } // 保存志愿者服务活动信息到文件 void saveActivity(VolunteerActivity activity) { FILE *fp = fopen("volunteer_activities.txt", "a"); if (fp == NULL) { printf("文件打开失败!\n"); return; } fprintf(fp, "%s %s %s %s %s\n", activity.name, activity.phone, activity.activityName, activity.location, activity.content); fclose(fp); } // 浏览志愿者服务活动信息 void browseActivity() { VolunteerActivity activity; FILE *fp = fopen("volunteer_activities.txt", "r"); if (fp == NULL) { printf("文件打开失败!\n"); return; } printf("志愿者姓名\t电话\t服务活动名称\t地点\t内容\n"); while (fscanf(fp, "%s %s %s %s %s", activity.name, activity.phone, activity.activityName, activity.location, activity.content)!= EOF) { printf("%s\t%s\t%s\t%s\t%s\n", activity.name, activity.phone, activity.activityName, activity.location, activity.content); } fclose(fp); } // 按志愿者姓名查询 void queryByName() { char name[50]; printf("请输入要查询的志愿者姓名: "); scanf("%s", name); VolunteerActivity activity; FILE *fp = fopen("volunteer_activities.txt", "r"); if (fp == NULL) { printf("文件打开失败!\n"); return; } int found = 0; printf("志愿者姓名\t电话\t服务活动名称\t地点\t内容\n"); while (fscanf(fp, "%s %s %s %s %s", activity.name, activity.phone, activity.activityName, activity.location, activity.content)!= EOF) { if (strcmp(activity.name, name) == 0) { printf("%s\t%s\t%s\t%s\t%s\n", activity.name, activity.phone, activity.activityName, activity.location, activity.content); found = 1; } } if (!found) { printf("未找到该志愿者的活动信息!\n"); } fclose(fp); } // 按手机号查询 void queryByPhone() { char phone[20]; printf("请输入要查询的手机号: "); scanf("%s", phone); VolunteerActivity activity; FILE *fp = fopen("volunteer_activities.txt", "r"); if (fp == NULL) { printf("文件打开失败!\n"); return; } int found = 0; printf("志愿者姓名\t电话\t服务活动名称\t地点\t内容\n"); while (fscanf(fp, "%s %s %s %s %s", activity.name, activity.phone, activity.activityName, activity.location, activity.content)!= EOF) { if (strcmp(activity.phone, phone) == 0) { printf("%s\t%s\t%s\t%s\t%s\n", activity.name, activity.phone, activity.activityName, activity.location, activity.content); found = 1; } } if (!found) { printf("未找到该手机号对应的活动信息!\n"); } fclose(fp); } // 删除志愿者服务活动信息 void deleteActivity() { char name[50]; printf("请输入要删除的志愿者姓名: "); scanf("%s", name); VolunteerActivity activity; FILE *fp = fopen("volunteer_activities.txt", "r"); FILE *fpTemp = fopen("temp.txt", "w"); if (fp == NULL || fpTemp == NULL) { printf("文件打开失败!\n"); return; } int found = 0; while (fscanf(fp, "%s %s %s %s %s", activity.name, activity.phone, activity.activityName, activity.location, activity.content)!= EOF) { if (strcmp(activity.name, name)!= 0) { fprintf(fpTemp, "%s %s %s %s %s\n", activity.name, activity.phone, activity.activityName, activity.location, activity.content); } else { found = 1; } } fclose(fp); fclose(fpTemp); remove("volunteer_activities.txt"); rename("temp.txt", "volunteer_activities.txt"); if (found) { printf("删除成功!\n"); } else { printf("未找到该志愿者的活动信息，删除失败!\n"); } } // 修改志愿者服务活动信息 void modifyActivity() { char name[50]; printf("请输入要修改的志愿者姓名: "); scanf("%s", name); VolunteerActivity activity; FILE *fp = fopen("volunteer_activities.txt", "r"); FILE *fpTemp = fopen("temp.txt", "w"); if (fp == NULL || fpTemp == NULL) { printf("文件打开失败!\n"); return; } int found = 0; while (fscanf(fp, "%s %s %s %s %s", activity.name, activity.phone, activity.activityName, activity.location, activity.content)!= EOF) { if (strcmp(activity.name, name) == 0) { printf("请重新输入志愿者电话: "); scanf("%s", activity.phone); printf("请重新输入志愿者参加的服务活动名称: "); scanf("%s", activity.activityName); printf("请重新输入活动地点: "); scanf("%s", activity.location); printf("请重新输入活动内容: "); scanf("%s", activity.content); found = 1; } fprintf(fpTemp, "%s %s %s %s %s\n", activity.name, activity.phone, activity.activityName, activity.location, activity.content); } fclose(fp); fclose(fpTemp); remove("volunteer_activities.txt"); rename("temp.txt", "volunteer_activities.txt"); if (found) { printf("修改成功!\n"); } else { printf("未找到该志愿者的活动信息，修改失败!\n"); } } // 主函数 int main() { int choice; do { printf("1. 录入志愿者服务活动信息\n"); printf("2. 浏览志愿者服务活动信息\n"); printf("3. 按志愿者姓名查询\n"); printf("4. 按手机号查询\n"); printf("5. 删除志愿者服务活动信息\n"); printf("6. 修改志愿者服务活动信息\n"); printf("7. 退出系统\n"); printf("请选择: "); scanf("%d", &choice); switch (choice) { case 1: { VolunteerActivity activity; inputActivity(&activity); saveActivity(activity); break; } case 2: browseActivity(); break; case 3: queryByName(); break; case 4: queryByPhone(); break; case 5: deleteActivity(); break; case 6: modifyActivity(); break; case 7: printf("谢谢使用，再见!\n"); break; default: printf("输入错误，请重新输入!\n"); } } while (choice!= 7); return 0; } ``` 以下是需要注意的逻辑点： 1. 对于文件操作，要确保文件能正常打开和关闭，避免出现资源泄漏。 2. 在进行字符串比较时，使用 `strcmp` 函数要注意其返回值的含义。 3. 输入数据时要对输入的内容进行合法性检查，防止出现错误。 [2025-03-03 21:05:42 | AI写代码神器 | 2066点数解答]