gwgsyxyt/step6.c

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

#define NUM_STUDENTS 3
#define NAME_LEN 50

typedef struct {
    int id;
    int class;
    char name[NAME_LEN];
    float scores[3];
    float total;
} Student;

// <20>ȽϺ<C8BD><CFBA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>qsort<72><74><EFBFBD><EFBFBD>
int compare(const void *a, const void *b) {
    Student *studentA = (Student *)a;
    Student *studentB = (Student *)b;

    if (studentA->class != studentB->class) {
        return studentA->class - studentB->class;
    } else {
        return studentB->total - studentA->total; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܳɼ<DCB3>
    }
}

// <20><><EFBFBD><EFBFBD><EFBFBD>ܳɼ<DCB3>
void calculateTotal(Student *student) {
    student->total = student->scores[0] + student->scores[1] + student->scores[2];
}

// <20><>ӡѧ<D3A1><D1A7><EFBFBD><EFBFBD>Ϣ
void printStudents(Student students[], int count) {
    int prevClass = -1;
    int i;
    for (i = 0; i < count; i++) {
        if (students[i].class != prevClass) {
            printf("%d", students[i].class);
            prevClass = students[i].class;
        } else {
            printf("   "); // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ո<EFBFBD>
        }
        printf(" %d %s %.1f %.1f %.1f", students[i].id, students[i].name,
               students[i].scores[0], students[i].scores[1], students[i].scores[2]);

        // <20><><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7>Ǹո<C7B8><D5B8>޸ĵ<DEB8>ѧ<EFBFBD><D1A7>
        if (i == NUM_STUDENTS - 1 || students[i + 1].class != students[i].class ||
            students[i + 1].id != students[i].id + 1) {
            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><CDAC><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߾<EFBFBD><DFBE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ҵ<EFBFBD><D2B5>Ǹ<EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϣ<D0B6>
            // ע<>⣺<EFBFBD><E2A3BA><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϿ<D0B6><CFBF>ܲ<EFBFBD><DCB2><EFBFBD><EFBFBD>Ͻ<EFBFBD><CFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><C3B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>־<EFBFBD><D6BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7>ҵ<EFBFBD><D2B5>˲<EFBFBD><CBB2>޸<EFBFBD><DEB8><EFBFBD>ѧ<EFBFBD><D1A7>
            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĿҪ<C4BF><D2AA>ֻ<EFBFBD><D6BB><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>޸<EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>ȫ<EFBFBD><C8AB><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8>ѧ<EFBFBD><D1A7>Ѱ<EFBFBD>ң<EFBFBD><D2A3><EFBFBD><EFBFBD>ǿ<EFBFBD><C7BF>Լ<EFBFBD><D4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2><EFBFBD><EFBFBD>ȷ<EFBFBD><C8B7>
            // <20><>ֻ<EFBFBD><D6BB><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ƥ<EFBFBD><C6A5><EFBFBD><EFBFBD><EEA3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>򻯴<EFBFBD><F2BBAFB4><EFBFBD>
            printf(" modified\n");
        } else {
            printf("\n");
        }
    }
}

// <20>޸<EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
void modifyStudent(Student students[], int count, int id, int class, const char *name, float scores[]) {
    int i;
	for (i = 0; i < count; i++) {
        if (students[i].id == id) {
            students[i].class = class;
            strncpy(students[i].name, name, NAME_LEN);
            students[i].scores[0] = scores[0];
            students[i].scores[1] = scores[1];
            students[i].scores[2] = scores[2];
            calculateTotal(&students[i]);

            // <20><><EFBFBD>޸ĺ<DEB8><C4BA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
            qsort(students, count, sizeof(Student), compare);
            return;
        }
    }
    // <20><><EFBFBD><EFBFBD>û<EFBFBD><C3BB><EFBFBD>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD>򲻽<EFBFBD><F2B2BBBD><EFBFBD><EFBFBD>κβ<CEBA><CEB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>鱣<EFBFBD><E9B1A3>ԭ<EFBFBD><D4AD><EFBFBD><EFBFBD>
}

int main() {
    // <20><>ʼ<EFBFBD><CABC>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
    Student students[NUM_STUDENTS] = {
        {10001, 11, "Zhang", {99.5, 88.5, 89.5}, 0},
        {10002, 12, "Yang", {77.9, 56.5, 87.5}, 0},
        {10003, 11, "Liang", {92.5, 99.0, 60.5}, 0}
    };

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD>ܳɼ<DCB3>
    int i;
    for (i = 0; i < NUM_STUDENTS; i++) {
        calculateTotal(&students[i]);
    }

    // <20><>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    qsort(students, NUM_STUDENTS, sizeof(Student), compare);

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>޸<EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>ȫ<EFBFBD><C8AB><EFBFBD><EFBFBD>Ϣ
    int id, class;
    char name[NAME_LEN];
    float scores[3];
    printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>޸<EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD> <20>༶ <20><><EFBFBD><EFBFBD> <20>ɼ<EFBFBD>1 <20>ɼ<EFBFBD>2 <20>ɼ<EFBFBD>3<EFBFBD><33><EFBFBD><EFBFBD>\n");
    scanf("%d %d %s %f %f %f", &id, &class, name, &scores[0], &scores[1], &scores[2]);

    // <20>޸<EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    modifyStudent(students, NUM_STUDENTS, id, class, name, scores);

    // <20><>ӡ<EFBFBD><D3A1><EFBFBD>º<EFBFBD><C2BA><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
    printStudents(students, NUM_STUDENTS);

    return 0;
}