xjgl/step6.c

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

typedef struct {
    char id[20];
    char clas[20];
    char name[20];
    double score1;
    double score2;
    double score3;
    double score;
} Student;

void inputStudentInfo(Student *student) {
    scanf("%s %s %s", student->id, student->clas, student->name);
    scanf("%lf %lf %lf", &student->score1, &student->score2, &student->score3);
    student->score = student->score1 + student->score2 + student->score3;
}

void displayStudentInfo(Student student, int isFirstInClass) {
    if (isFirstInClass) {
        printf("%s %s %s %.1lf %.1lf %.1lf",
               student.clas, student.id, student.name,
               student.score1, student.score2, student.score3);
    } else {
        printf("   %s %s %.1lf %.1lf %.1lf",
               student.id, student.name,
               student.score1, student.score2, student.score3);
    }
}

int findStudentById(Student *students, int studentCount, char *id) {
    for (int i = 0; i < studentCount; i++) {
        if (strcmp(students[i].id, id) == 0) {
            return i;
        }
    }
    return -1;
}

void modifyStudentInfo(Student *students, int studentCount, char *id) {
    int index = findStudentById(students, studentCount, id);
    if (index != -1) {
        printf("Please enter the modified information:\n");
        inputStudentInfo(&students[index]);
    } else {
        printf("The relevant student was not found, and modification is not possible\n");
    }

}

void bubbleSortByClassAndScore(Student *students, int studentCount) {
    // 冒泡排序，先按班级从小到大，再按总成绩从大到小
    for (int i = 0; i < studentCount - 1; i++) {
        for (int j = 0; j < studentCount - i - 1; j++) {
            if (strcmp(students[j].clas, students[j + 1].clas) > 0 ||
                (strcmp(students[j].clas, students[j + 1].clas) == 0 && students[j].score < students[j + 1].score)) {
                // 交换两个学生的信息
                Student temp = students[j];
                students[j] = students[j + 1];
                students[j + 1] = temp;
            }
        }
    }
}

int main() {
    Student students[100];
    int studentCount = 3;

    // 初始化三个学生信息
    strcpy(students[0].id, "10001");
    strcpy(students[0].clas, "11");
    strcpy(students[0].name, "Zhang");
    students[0].score1 = 99.5;
    students[0].score2 = 88.5;
    students[0].score3 = 89.5;
    students[0].score = students[0].score1 + students[0].score2 + students[0].score3;

    strcpy(students[1].id, "10002");
    strcpy(students[1].clas, "12");
    strcpy(students[1].name, "Yang");
    students[1].score1 = 77.9;
    students[1].score2 = 56.5;
    students[1].score3 = 87.5;
    students[1].score = students[1].score1 + students[1].score2 + students[1].score3;

    strcpy(students[2].id, "10003");
    strcpy(students[2].clas, "11");
    strcpy(students[2].name, "Liang");
    students[2].score1 = 92.5;
    students[2].score2 = 99.0;
    students[2].score3 = 60.5;
    students[2].score = students[2].score1 + students[2].score2 + students[2].score3;

    bubbleSortByClassAndScore(students, studentCount);

    // 输出所有学生信息
    int isFirstInClass = 1;
    for (int i = 0; i < studentCount; i++) {
        if (i > 0 && strcmp(students[i].clas, students[i - 1].clas) == 0) {
            isFirstInClass = 0;
        } else {
            isFirstInClass = 1;
        }
        displayStudentInfo(students[i], isFirstInClass);
        printf("\n");
    }

    // 修改学生信息
    char id[20];
    printf("Please enter the student ID to be modified:");
    scanf("%s", id);
    modifyStudentInfo(students, studentCount, id);

    // 再次排序并输出所有学生信息
    bubbleSortByClassAndScore(students, studentCount);
    int d=findStudentById(students, studentCount, id);
    isFirstInClass = 1;
    for (int i = 0; i < studentCount; i++) {
        if (i > 0 && strcmp(students[i].clas, students[i - 1].clas) == 0) {
            isFirstInClass = 0;
        } else {
            isFirstInClass = 1;
        }
        if (i == d) {
         
            displayStudentInfo(students[i], isFirstInClass);
            printf("  modified\n");
        }
        else
        {
            displayStudentInfo(students[i], isFirstInClass);
            printf("\n");

        }
    }

    return 0;
}