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85 lines
2.9 KiB
85 lines
2.9 KiB
#include <stdio.h>
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#include <stdlib.h> // 包含了 qsort 函数所需的头文件
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#include <string.h> // 包含了字符串处理函数所需的头文件
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// 学生信息的结构体
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struct Student {
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int student_id;
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int class_id;
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char name[50];
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float score1;
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float score2;
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float score3;
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};
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// 比较函数，用于排序
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int compareStudents(const void *a, const void *b) {
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struct Student *student1 = (struct Student *)a;
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struct Student *student2 = (struct Student *)b;
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if (student1->class_id != student2->class_id) {
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return student1->class_id - student2->class_id;
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} else {
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float total_score1 = student1->score1 + student1->score2 + student1->score3;
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float total_score2 = student2->score1 + student2->score2 + student2->score3;
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return total_score2 - total_score1;
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}
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}
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int main() {
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struct Student students[100];
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int num_students = 3; // 初始有3个学生信息
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// 初始化已有学生信息
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students[0] = (struct Student){10001, 11, "Zhang", 99.5, 88.5, 89.5};
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students[1] = (struct Student){10002, 12, "Yang", 77.9, 56.5, 87.5};
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students[2] = (struct Student){10003, 11, "Liang", 92.5, 99.0, 60.5};
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// 对已有学生信息进行排序
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qsort(students, num_students, sizeof(struct Student), compareStudents);
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// 输入待删除学生的学号或姓名
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char search[50];
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printf("输入待删除学生的学号或姓名：");
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scanf("%s", search);
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// 检查学号或姓名是否存在，如果不存在，输出原有三个学生信息并退出程序
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int i,j,found = 0;
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for (i = 0; i < num_students; i++) {
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if (strcmp(search, students[i].name) == 0 || atoi(search) == students[i].student_id) {
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found = 1;
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for (j = i; j < num_students - 1; j++) {
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students[j] = students[j + 1];
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}
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num_students--;
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break;
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}
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}
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if (!found) {
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printf("该学生信息不存在，输出原有三个学生信息并退出程序：\n");
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for (i = 0; i < num_students; i++) {
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printf("%d %d %s %.1f %.1f %.1f\n", students[i].student_id, students[i].class_id, students[i].name, students[i].score1, students[i].score2, students[i].score3);
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}
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return 0;
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}
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// 输出剩余学生的信息
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for (i = 0; i < num_students; i++) {
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printf("%d %d %s %.1f %.1f %.1f\n", students[i].student_id, students[i].class_id, students[i].name, students[i].score1, students[i].score2, students[i].score3);
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}
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// 询问用户是否确认删除
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char confirm[3];
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printf("Are you sure(yes/no)? ");
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scanf("%s", confirm);
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if (strcmp(confirm, "n") == 0) {
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// 如果用户输入 "no"，再次输出所有学生信息，然后程序结束
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for (i = 0; i < 3; i++) {
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printf("%d %d %s %.1f %.1f %.1f\n", students[i].student_id, students[i].class_id, students[i].name, students[i].score1, students[i].score2, students[i].score3);
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}
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}
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return 0;
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}
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