用C语言代码设计一个学生成绩查询统计系统

好的，以下是一个简单的学生成绩查询统计系统的C语言代码：

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

#define MAX_STUDENTS 50
#define MAX_NAME_LENGTH 20

typedef struct {
    char name[MAX_NAME_LENGTH];
    int id;
    int score;
} Student;

void input_students(Student students[], int *num_students);
void print_students(Student students[], int num_students);
float calculate_average_score(Student students[], int num_students);
int find_highest_score(Student students[], int num_students);

int main() {
    Student students[MAX_STUDENTS];
    int num_students = 0;
    float average_score;
    int highest_score_index;

    input_students(students, &num_students);
    printf("\n");
    print_students(students, num_students);

    average_score = calculate_average_score(students, num_students);
    printf("\nThe average score is: %.2f\n", average_score);

    highest_score_index = find_highest_score(students, num_students);
    printf("\nThe student with the highest score is %s with a score of %d\n", students[highest_score_index].name, students[highest_score_index].score);

    return 0;
}

void input_students(Student students[], int *num_students) {
    printf("Enter the number of students: ");
    scanf("%d", num_students);

    for (int i = 0; i < *num_students; i++) {
        printf("\nEnter the name of student %d: ", i + 1);
        scanf("%s", students[i].name);

        printf("Enter the ID of student %d: ", i + 1);
        scanf("%d", &students[i].id);

        printf("Enter the score of student %d: ", i + 1);
        scanf("%d", &students[i].score);
    }
}

void print_students(Student students[], int num_students) {
    printf("Name\tID\tScore\n");

    for (int i = 0; i < num_students; i++) {
        printf("%s\t%d\t%d\n", students[i].name, students[i].id, students[i].score);
    }
}

float calculate_average_score(Student students[], int num_students) {
    float sum = 0;

    for (int i = 0; i < num_students; i++) {
        sum += students[i].score;
    }

    return sum / num_students;
}

int find_highest_score(Student students[], int num_students) {
    int highest_score_index = 0;

    for (int i = 1; i < num_students; i++) {
        if (students[i].score > students[highest_score_index].score) {
            highest_score_index = i;
        }
    }

    return highest_score_index;
}

该程序定义了一个 `Student` 结构体，其中包含学生的姓名、ID 和成绩信息。程序还定义了一些帮助函数，包括输入学生信息、打印学生信息、计算平均分和查找最高分的函数。在 `main` 函数中，程序首先调用 `input_students` 函数以输入学生信息，然后调用 `print_students` 函数以打印学生信息。接着，程序调用 `calculate_average_score` 函数以计算平均分，并打印该值。最后，程序调用 `find_highest_score` 函数以查找最高分的学生，并打印该学生的姓名和分数。