drd/学籍管理系统8.cpp

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

// 定义学生结构体，使用字符串数组来存储学号、班级和姓名
struct Student {
    char id[20];
    char clas[20];
    char name[20];
    double score1;
    double score2;
    double score3;
    double score;  // 用于存储总成绩，方便后续排序等操作
};

// 交换两个学生结构体的函数
void swap(struct Student *a, struct Student *b) {
    struct Student temp = *a;
    *a = *b;
    *b = temp;
}

// 计算学生总成绩的函数
void calculateScore(struct Student *s) {
    s->score = s->score1 + s->score2 + s->score3;
}

// 录入学生信息的函数
void inputStudents(struct Student students[], int *num_students) {
    char choice[10];
    do {
        struct Student new_student;
        printf("Id ");
        scanf("%s", new_student.id);
        printf("class ");
        scanf("%s", new_student.clas);
        printf("name ");
        scanf("%s", new_student.name);
        printf("score1 ");
        scanf("%lf", &new_student.score1);
        printf("score2 ");
        scanf("%lf", &new_student.score2);
        printf("score3 ");
        scanf("%lf", &new_student.score3);
        calculateScore(&new_student);

        students[*num_students] = new_student;
        (*num_students)++;

        printf("continue?\n");
        scanf("%s", choice);
    } while (strcmp(choice, "yes") == 0);
}
void outputStudents(struct Student students[], int num_students) {
    for (int i = 0; i < num_students; i++) {
        printf("%s,%s,%s,%.1lf,%.1lf,%.1lf,%.1lf\n", students[i].id, students[i].clas, students[i].name,
               students[i].score1, students[i].score2, students[i].score3, students[i].score);
    }
}
// 根据学号或姓名删除学生信息的函数
void deleteStudents(struct Student students[], int *num_students, char target[20]) {
    int found = 0;
    for (int i = 0; i < *num_students; i++) {
        if (strcmp(students[i].id, target) == 0 || strcmp(students[i].name, target) == 0) {
            found = 1;
            for (int j = i; j < *num_students - 1; j++) {
                students[j] = students[j + 1];
            }
            (*num_students)--;
            i--;  // 因为删除元素后，当前位置元素改变了，需要重新检查当前位置
        }
    }
    if (!found) {
        // 如果没找到要删除的学生，原样输出所有学生信息
        outputStudents(students, *num_students);
    } else {
        outputStudents(students, *num_students);
    }
}

// 根据学号或班级查询学生信息的函数
void selectStudents(struct Student students[], int num_students, char target[20]) {
    int found = 0;
    for (int i = 0; i < num_students; i++) {
        if (strcmp(students[i].id, target) == 0 || strcmp(students[i].clas, target) == 0) {
            found = 1;
            printf("%s,%s,%s,%.1lf,%.1lf,%.1lf,%.1lf\n", students[i].id, students[i].clas, students[i].name,
                   students[i].score1, students[i].score2, students[i].score3, students[i].score);
        }
    }
    if (!found) {
        printf("there is no eligible student\n");
    }
}

// 按照班级从小到大，同一班级内总成绩从大到小排序学生信息的函数
void orderStudents(struct Student students[], int num_students) {
    for (int i = 0; i < num_students - 1; i++) {
        for (int j = 0; j < num_students - i - 1; j++) {
            if (strcmp(students[j].clas, students[j + 1].clas) > 0) {
                swap(&students[j], &students[j + 1]);
            } else if (strcmp(students[j].clas, students[j + 1].clas) == 0) {
                if (students[j].score < students[j + 1].score) {
                    swap(&students[j], &students[j + 1]);
                }
            }
        }
    }
}

// 输出学生信息的函数


int main() {
    struct Student students[100];  // 假设最多存储100个学生信息，可根据实际情况调整大小
    int num_students = 0;

    int option;
    while (1) {
        printf("1.input\n2.delete\n3.select\n4.order\n5.output\n6.quit\nplease input your option\n");
        scanf("%d", &option);

        switch (option) {
            case 1:
                inputStudents(students, &num_students);
                break;
            case 2: {
                char target[20];
                scanf("%s", target);
                deleteStudents(students, &num_students, target);
            }
                break;
            case 3: {
                char target[20];
                scanf("%s", target);
                selectStudents(students, num_students, target);
            }
                break;
            case 4:
                orderStudents(students, num_students);
                break;
            case 5:
                outputStudents(students, num_students);
                break;
            case 6:
                return 0;
            default:
                printf("wuxiao\n");
        }
    }

    return 0;
}