qwe/b7.c

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

#define MAX_STUDENTS 100

typedef struct Student {
    int id;
    int class_num;
    char name[20];
    double score1;
    double score2;
    double score3;
    double total_score;
} Student;

void calculateTotalScore(Student *students, int num) {
	int i;
    for (i = 0; i < num; i++) {
        students[i].total_score = students[i].score1 + students[i].score2 + students[i].score3;
    }
}
void swap(Student *a, Student *b) {
    Student temp = *a;
    *a = *b;
    *b = temp;
}

void sortStudents(Student *students, int num) {
	int i,j;
    for ( i = 0; i < num - 1; i++) {
        for ( j = 0; j < num - i - 1; j++) {
            if (students[j].class_num > students[j + 1].class_num) {
                swap(&students[j], &students[j + 1]);
            } else if (students[j].class_num == students[j + 1].class_num &&
                       students[j].total_score < students[j + 1].total_score) {
                swap(&students[j], &students[j + 1]);
            }
        }
    }
}

void searchStudents(Student *students, int num, char *query_type, char *query_content, Student *result, int *result_num) {
    *result_num = 0;
    int i;
    if (query_type[0] == '1') {  
        int start_class, end_class;
        sscanf(query_content, "%d-%d", &start_class, &end_class);
        for (i = 0; i < num; i++) {
            if (students[i].class_num >= start_class && students[i].class_num <= end_class) {
                result[*result_num] = students[i];
                (*result_num)++;
            }
        }
    } else if (query_type[0] == '2') { 
        int start_id, end_id;
        sscanf(query_content, "%d-%d", &start_id, &end_id);
        for ( i = 0; i < num; i++) {
            if (students[i].id >= start_id && students[i].id <= end_id) {
                result[*result_num] = students[i];
                (*result_num)++;
            }
        }
    } else if (query_type[0] == '3') {
        char prefix[20];
        strcpy(prefix, query_content);
        for (i = 0; i < num; i++) {
            if (strncmp(students[i].name, prefix, strlen(prefix)) == 0) {
                result[*result_num] = students[i];
                (*result_num)++;
            }
        }
    } else if (query_type[0] == '4') {
        double min_score;
        sscanf(query_content, "%lf", &min_score);
        for ( i = 0; i < num; i++) {
            if (students[i].total_score >= min_score) {
                result[*result_num] = students[i];
                (*result_num)++;
            }
        }
    } else if (query_type[0] == '5') {
        int class_num;
        int start_id, end_id;
        sscanf(query_content, "%d.%d-%d", &class_num, &start_id, &end_id);
        for ( i = 0; i < num; i++) {
            if (students[i].class_num == class_num && students[i].id >= start_id && students[i].id <= end_id) {
                result[*result_num] = students[i];
                (*result_num)++;
            }
        }
    }
}

int main() {
    Student students[MAX_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},
        {10004, 11, "Cai", 89.6, 56.9, 90.5, 0},
        {10005, 14, "Fu", 55.6, 67.9, 98.9, 0},
        {10006, 12, "Mao", 22.1, 45.9, 99.2, 0},
        {10007, 13, "Zhan", 35.6, 67.9, 88.0, 0}
    };
    int num_students = 7,i;

    calculateTotalScore(students, num_students);

    char query_type[10];
    char query_content[50];
    
    scanf("%s %s", query_type, query_content);

    Student result[MAX_STUDENTS];
    int result_num;
    searchStudents(students, num_students, query_type, query_content, result, &result_num);
    sortStudents(result, result_num);

    for (i = 0; i < result_num; i++) {
        printf("%d %d %s %.1lf %.1lf %.1lf\n", result[i].id, result[i].class_num, result[i].name,
               result[i].score1, result[i].score2, result[i].score3);
    }

    return 0;
}