studentmanagementsystemsystem/$RZBOZ36.cpp

#include <stdio.h>
#include <stdlib.h>

// <20><><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><E1B9B9><EFBFBD><EFBFBD><EFBFBD>洢ѧ<E6B4A2><D1A7><EFBFBD><EFBFBD>Ϣ
struct Student {
    int id;
    int class_num;
    float grade1;
    float grade2;
    float grade3;
};

// <20>Ƚ<EFBFBD><C8BD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD>Ĵ<EFBFBD>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
int compareStudents(const void *a, const void *b) {
    struct Student *studentA = (struct Student *)a;
    struct Student *studentB = (struct Student *)b;

    if (studentA->class_num < studentB->class_num) {
        return -1;
    } else if (studentA->class_num > studentB->class_num) {
        return 1;
    } else {
        // <20>༶<EFBFBD><E0BCB6>ͬ<EFBFBD><CDAC><EFBFBD>Ƚ<EFBFBD><C8BD>ܳɼ<DCB3>
        float totalA = studentA->grade1 + studentA->grade2 + studentA->grade3;
        float totalB = studentB->grade1 + studentB->grade2 + studentB->grade3;

        if (totalA > totalB) {
            return -1;
        } else if (totalA < totalB) {
            return 1;
        } else {
            return 0;
        }
    }
}

// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
void insertStudent(struct Student students[], int *size, struct Student newStudent) {
    int i;
    // <20>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
    for (i = 0; i < *size; i++) {
        if (compareStudents(&newStudent, &students[i]) > 0) {
            continue;
        } else {
            break;
        }
    }

    // <20>ƶ<EFBFBD>Ԫ<EFBFBD><D4AA><EFBFBD>ڳ<EFBFBD><DAB3><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
    for (int j = *size; j > i; j--) {
        students[j] = students[j - 1];
    }

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7>
    students[i] = newStudent;
    (*size)++;
}

// <20><><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD>Ƿ<EFBFBD><C7B7>Ѵ<EFBFBD><D1B4><EFBFBD>
int checkIdExists(struct Student students[], int size, int id) {
    for (int i = 0; i < size; i++) {
        if (students[i].id == id) {
            return i;
        }
    }
    return -1;
}

// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
void printStudents(struct Student students[], int size) {
    for (int i = 0; i < size; i++) {
        printf("%d %d %.1f %.1f %.1f", students[i].id, students[i].class_num, students[i].grade1, students[i].grade2, students[i].grade3);
        if (i == size - 1) {
            printf(" inserted\n");
        } else {
            printf("\n");
        }
    }
}

int main() {
    // <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2><EFBFBD><EFBFBD>
    struct Student students[100];
    students[0].id = 10001;
    students[0].class_num = 11;
    students[0].grade1 = 99.5;
    students[0].grade2 = 88.5;
    students[0].grade3 = 89.5;

    students[1].id = 10002;
    students[1].class_num = 12;
    students[1].grade1 = 77.9;
    students[1].grade2 = 56.5;
    students[1].grade3 = 87.5;

    students[2].id = 10003;
    students[2].class_num = 11;
    students[2].grade1 = 92.5;
    students[2].grade2 = 99.0;
    students[2].grade3 = 60.5;

    int size = 3;

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
    struct Student newStudent;
    printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD> <20>༶ <20>ɼ<EFBFBD>1 <20>ɼ<EFBFBD>2 <20>ɼ<EFBFBD>3<EFBFBD><33><EFBFBD><EFBFBD>");
    scanf("%d %d %f %f %f", &newStudent.id, &newStudent.class_num, &newStudent.grade1, &newStudent.grade2, &newStudent.grade3);

    // <20><><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD>Ƿ<EFBFBD><C7B7>Ѵ<EFBFBD><D1B4><EFBFBD>
    int existsIndex = checkIdExists(students, size, newStudent.id);
    if (existsIndex!= -1) {
        printf("<EFBFBD>Ѵ<EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>\n");
        printStudents(students, size);
        return 0;
    }

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
    insertStudent(students, &size, newStudent);

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
    printStudents(students, size);

    return 0;
}