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79 lines
3.1 KiB
79 lines
3.1 KiB
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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// 定义学生结构体
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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[20];
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double score1;
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double score2;
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double score3;
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};
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// 定义全局学生数组
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struct Student student_data[] = {
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{10001, 11, "Zhang", 99.5, 88.5, 89.5},
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{10002, 12, "Yang", 77.9, 56.5, 87.5},
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{10003, 11, "Liang", 92.5, 99.0, 60.5},
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{10004, 11, "Cai", 89.6, 56.9, 90.5},
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{10005, 14, "Fu", 55.6, 67.9, 98.9},
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{10006, 12, "Mao", 22.1, 45.9, 99.2},
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{10007, 13, "Zhan", 35.6, 67.9, 88.0}
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};
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// 定义学生数量
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int student_count = sizeof(student_data) / sizeof(student_data[0]);
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// 比较函数用于按班级从小到大，同班级按总成绩从大到小排序
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int compare_students(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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double total1 = student1->score1 + student1->score2 + student1->score3;
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double total2 = student2->score1 + student2->score2 + student2->score3;
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return (total2 - total1) > 0 ? 1 : -1;
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}
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}
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// 查询学生信息函数
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void query_students(int query_type, char *query_value) {
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for (int i = 0; i < student_count; i++) {
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struct Student student = student_data[i];
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double total = student.score1 + student.score2 + student.score3;
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if (query_type == 1 && student.class_id >= query_value[0] && student.class_id <= query_value[2]) {
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printf("%d %d %s %.1lf %.1lf %.1lf\n", student.student_id, student.class_id, student.name, student.score1, student.score2, student.score3);
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} else if (query_type == 2 && student.student_id >= query_value[0] && student.student_id <= query_value[2]) {
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printf("%d %d %s %.1lf %.1lf %.1lf\n", student.student_id, student.class_id, student.name, student.score1, student.score2, student.score3);
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} else if (query_type == 3 && strncmp(student.name, query_value, strlen(query_value)) == 0) {
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printf("%d %d %s %.1lf %.1lf %.1lf\n", student.student_id, student.class_id, student.name, student.score1, student.score2, student.score3);
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} else if (query_type == 4 && total >= atof(query_value)) {
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printf("%d %d %s %.1lf %.1lf %.1lf\n", student.student_id, student.class_id, student.name, student.score1, student.score2, student.score3);
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} else if (query_type == 5 && student.class_id == query_value[0] && student.student_id >= query_value[2] && student.student_id <= query_value[4]) {
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printf("%d %d %s %.1lf %.1lf %.1lf\n", student.student_id, student.class_id, student.name, student.score1, student.score2, student.score3);
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}
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}
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}
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int main() {
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int query_type;
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char query_value[20];
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printf("请输入查询类型和值（格式：类型 值）：");
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scanf("%d %s", &query_type, query_value);
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// 排序学生信息
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qsort(student_data, student_count, sizeof(struct Student), compare_students);
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// 查询学生信息
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query_students(query_type, query_value);
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return 0;
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}
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