将这个代码改为C语言，使其能再codeblocks里能运行

将上述Python代码转换为C语言并在CodeBlocks中运行，需要使用`stdio.h`, `stdlib.h` 和 `string.h`头文件，并创建一个结构体来表示学生信息。下面是一个简化的C语言版本：

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

typedef struct {
    char id[10];
    char name[20];
    int scores[3];  // 课程成绩数组
    int total_score;
} Student;

void add_student(Student* students, int n) {
    Student new_student;
    scanf("%s %s", new_student.id, new_student.name);
    for (int i = 0; i < 3; i++) {
        scanf("%d", &new_student.scores[i]);
    }
    new_student.total_score = 0;
    for (int i = 0; i < 3; i++) {
        new_student.total_score += new_student.scores[i];
    }
    students[n] = new_student;
}

double calculate_average(const Student* students, int n) {
    double total_avg = 0.0;
    for (int i = 0; i < n; i++) {
        total_avg += students[i].total_score;
    }
    return total_avg / n;
}

void find_max_student(Student* students, int n, Student* max_student) {
    *max_student = students[0];
    for (int i = 1; i < n; i++) {
        if (students[i].total_score > max_student->total_score) {
            *max_student = students[i];
        }
    }
}

int main() {
    int n, i;
    printf("请输入学生数量: ");
    scanf("%d", &n);

    Student* students = malloc(n * sizeof(Student));
    add_student(students, n);  // 添加学生

    double avg_scores[] = calculate_average(students, n);
    printf("各门课的平均成绩: ");
    for (i = 0; i < 3; i++) {
        printf("%.0f ", avg_scores[i]);
    }

    Student max_student;
    find_max_student(students, n, &max_student);
    printf("\n最高分学生信息: %s %s %d %d %d\n",
           max_student.id, max_student.name, max_student.scores[0], max_student.scores[1], max_student.scores[2]);

    free(students);
    return 0;
}

注意：在CodeBlocks中编译和运行此C代码，你需要确保已经安装了`gcc`编译器，并配置了正确的路径，以便可以链接和运行生成的二进制文件。记得保存代码到`.c`文件，然后在CodeBlocks的构建菜单中选择合适的选项进行编译和运行。