xueji/6.c

#include <stdio.h>
#include <string.h>

struct Student {
    char id[10];
    int class_num;
    char name[20];
    float score[3];
};

void sort_students(struct Student students[], int size) {
    int i, j;
    for (i = 0; i < size; i++) {
        for (j = i + 1; j < size; j++) {
            if (students[i].class_num > students[j].class_num ||
                (students[i].class_num == students[j].class_num &&
                    students[i].score[0] + students[i].score[1] + students[i].score[2] <
                    students[j].score[0] + students[j].score[1] + students[j].score[2])) {
                struct Student temp = students[i];
                students[i] = students[j];
                students[j] = temp;
            }
        }
    }
}

void print_student(struct Student student, int is_first) {
    if (is_first) {
        printf("%d %s %s %.1f %.1f %.1f ", student.class_num, student.id, student.name,
            student.score[0], student.score[1], student.score[2]);
    }
    else {
        printf("   %s %s %.1f %.1f %.1f\n", student.id, student.name,
            student.score[0], student.score[1], student.score[2]);
    }
}

int main() {
    struct Student students[3] = {
        {"10001", 11, "Zhang", {99.5, 88.5, 89.5}},
        {"10002", 12, "Yang", {77.9, 56.5, 87.5}},
        {"10003", 11, "Liang", {92.5, 99.0, 60.5}}
    };
    int size = sizeof(students) / sizeof(students[0]);

    sort_students(students, size);

    char search_id[10];
    printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>޸ĵ<EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>\n");
    scanf("%s %d %s %f %f %f", search_id, &students[0].class_num, students[0].name,
        &students[0].score[0], &students[0].score[1], &students[0].score[2]);

    int found = 0, i;
    for (i = 0; i < size; i++) {
        if (strcmp(students[i].id, search_id) == 0) {
            found = 1;
            students[i] = students[0];
            break;
        }
    }

    if (found) {
        sort_students(students, size);
        printf("%d ", students[0].class_num);
        print_student(students[0], 1);
        printf("modified\n");
        for (i = 1; i < size; i++) {
            if (students[i].class_num == students[i - 1].class_num) {
                print_student(students[i], 0);
            }
            else {
                printf("%d ", students[i].class_num);
                print_student(students[i], 1);
            }
        }

    }
    else {
        printf("δ<EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ\n");
    }

    return 0;
}