#include<stdio.h> #include<stdlib.h> #include<string.h> #include<windows.h> struct stu { int id; char name[10]; float grade[11]; float sum; float average; float gpa; struct stu* next; }stu* head;stu *tail;按照这个结构体来续写C语言代码。要求将学生信息保存在硬盘文件中，通过制定文件路径和文件名称来导入学生信息；按照学号对所有学生信息进行升序、降序排列，并输出到屏幕显示或输出到文件

好的，我会为你续写代码。以下是完整代码： ```c #include <stdio.h> #include <stdlib.h> #include <string.h> #include <windows.h> struct stu { int id; char name[10]; float grade[11]; float sum; float average; float gpa; struct stu* next; }; typedef struct stu stu; stu* head = NULL; stu* tail = NULL; // 读取学生信息 void read_info(char* file_name) { FILE* fp; fp = fopen(file_name, "r"); if(fp == NULL) { printf("Failed to open file %s\n", file_name); return; } while(!feof(fp)) { stu* s = (stu*)malloc(sizeof(stu)); fscanf(fp, "%d%s%f%f%f", &s->id, s->name, &s->grade[0], &s->grade[1], &s->grade[2]); s->sum = s->grade[0] + s->grade[1] + s->grade[2]; s->average = s->sum / 3.0; s->gpa = s->average / 20.0 - 1.5; if(head == NULL) { head = s; tail = s; tail->next = NULL; } else { tail->next = s; tail = s; tail->next = NULL; } } fclose(fp); } // 写入学生信息 void write_info(char* file_name) { FILE* fp; fp = fopen(file_name, "w"); if(fp == NULL) { printf("Failed to open file %s\n", file_name); return; } stu* p = head; while(p != NULL) { fprintf(fp, "%d %s %.2f %.2f %.2f\n", p->id, p->name, p->grade[0], p->grade[1], p->grade[2]); p = p->next; } fclose(fp); } // 按照学号升序排序 void sort_by_id_ascending() { int len = 0; stu* p = head; while(p != NULL) { len++; p = p->next; } p = head; for(int i = 0; i < len - 1; i++) { for(int j = 0; j < len - i - 1; j++) { if(p->id > p->next->id) { stu* tmp = p->next; p->next = tmp->next; tmp->next = p; if(p == head) { head = tmp; } else { stu* q = head; while(q->next != p) { q = q->next; } q->next = tmp; } p = tmp; } p = p->next; } p = head; } } // 按照学号降序排序 void sort_by_id_descending() { int len = 0; stu* p = head; while(p != NULL) { len++; p = p->next; } p = head; for(int i = 0; i < len - 1; i++) { for(int j = 0; j < len - i - 1; j++) { if(p->id < p->next->id) { stu* tmp = p->next; p->next = tmp->next; tmp->next = p; if(p == head) { head = tmp; } else { stu* q = head; while(q->next != p) { q = q->next; } q->next = tmp; } p = tmp; } p = p->next; } p = head; } } // 输出学生信息 void print_info() { stu* p = head; while(p != NULL) { printf("%d %s %.2f %.2f %.2f %.2f\n", p->id, p->name, p->grade[0], p->grade[1], p->grade[2], p->gpa); p = p->next; } } int main() { char file_name[100]; printf("Please enter the file path and name: "); scanf("%s", file_name); read_info(file_name); printf("Before sorting:\n"); print_info(); sort_by_id_ascending(); printf("After sorting by id in ascending order:\n"); print_info(); sort_by_id_descending(); printf("After sorting by id in descending order:\n"); print_info(); printf("Please enter the file path and name you want to save the sorted information: "); scanf("%s", file_name); write_info(file_name); return 0; } ``` 这个程序可以通过文件读取来导入学生信息，根据学号升序或降序排列学生信息，并输出到屏幕或文件。请注意，在运行程序时，需要输入导入文件的路径和名称，以及希望将排序信息保存到的文件路径和名称。