以下是根据您的要求设计的C++代码：

cpp
Copy code

include <iostream>

class Student {
private:
long studentId;
double score1;
double score2;
double score3;

public:
// 构造函数初始化数据
Student(long id, double s1, double s2, double s3) {
studentId = id;
score1 = s1;
score2 = s2;
score3 = s3;
}

// 返回学生数据
long getStudentId() {
    return studentId;
}

double getScore1() {
    return score1;
}

double getScore2() {
    return score2;
}

double getScore3() {
    return score3;
}

};

void print(Student stu[], int n) {
for (int i = 0; i < n; i++) {
std::cout << "学号: " << stu[i].getStudentId() << std::endl;
std::cout << "成绩1: " << stu[i].getScore1() << std::endl;
std::cout << "成绩2: " << stu[i].getScore2() << std::endl;
std::cout << "成绩3: " << stu[i].getScore3() << std::endl;
std::cout << std::endl;
}
}

void find(Student stu[], long id, int n) {
for (int i = 0; i < n; i++) {
if (stu[i].getStudentId() == id) {
std::cout << "学号: " << stu[i].getStudentId() << std::endl;
std::cout << "成绩1: " << stu[i].getScore1() << std::endl;
std::cout << "成绩2: " << stu[i].getScore2() << std::endl;
std::cout << "成绩3: " << stu[i].getScore3() << std::endl;
return;
}
}
std::cout << "未找到学号为" << id << "的学生" << std::endl;
}

void max(Student stu[], int n) {
double maxTotalScore = 0.0;
int maxIndex = 0;

for (int i = 0; i < n; i++) {
    double totalScore = stu[i].getScore1() + stu[i].getScore2() + stu[i].getScore3();
    if (totalScore > maxTotalScore) {
        maxTotalScore = totalScore;
        maxIndex = i;
    }
}

std::cout << "总成绩最高的学生信息:" << std::endl;
std::cout << "学号: " << stu[maxIndex].getStudentId() << std::endl;
std::cout << "成绩1: " << stu[maxIndex].getScore1() << std::endl;
std::cout << "成绩2: " << stu[maxIndex].getScore2() << std::endl;
std::cout << "成绩3: " << stu[maxIndex].getScore3() << std::endl;

}

int main() {
// 创建student对象数组并赋值
const int numStudents = 3;
Student students[numStudents] = {
Student(1001, 85.5, 90.0, 78.5),
Student(1002, 92.0, 87.5, 80.0),
Student(1003, 78.5, 88.0, 95.5)
};

// 调用函数进行功能操作
print(students, numStudents);
find(students, 1002, numStudents);
max(students, numStudents);

return 0;

}
这段代码定义了一个学生类Student，其中包含学号和三门课程成绩作为数据成员，并实现了相应的初始化函数和获取数据的函数。然后，根据题目要求，实现了print函数用于输出每个学生的信息，find函数用于查找指定学号的学生成绩并输出，以及max函数用于输出总成绩最高的学生信息。在主函数中，创建了一个Student对象数组，并为对象数组赋值，然后调用上述函数来完成功能。