建立一个数组将实训12第2题定义的 学生数据存入数组。 数据为： { {"2020B200301","刘滨","男",18,{2020,9,20},70,85}, {"2020B200302","阚美娟","女",17,{2020,9,20},87,95}, {"2020B200303","胡大勇","男",17,{2020,9,20},69,80}, {"2020B200305","黎丽","女",18,{2020,9,20},68,88}, {"2020B200309","金鑫","男",19,{2019,9,1},90,85} } 将这些数据写人磁盘保存起来。

好的，以下是实现上述要求的C++代码：

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

struct student {
    string id;      // 学号
    string name;    // 姓名
    string gender;  // 性别
    int age;        // 年龄
    int birthday[3];    // 生日
    int score1;     // 成绩1
    int score2;     // 成绩2
};

int main() {
    student stu[5] = {
        {"2020B200301","刘滨","男",18,{2020,9,20},70,85},
        {"2020B200302","阚美娟","女",17,{2020,9,20},87,95},
        {"2020B200303","胡大勇","男",17,{2020,9,20},69,80},
        {"2020B200305","黎丽","女",18,{2020,9,20},68,88},
        {"2020B200309","金鑫","男",19,{2019,9,1},90,85}
    };
    
    ofstream outFile("students.txt");   // 打开输出文件流
    
    if (outFile.is_open()) {    // 如果成功打开文件
        for (int i = 0; i < 5; i++) {
            outFile << stu[i].id << " " << stu[i].name << " " << stu[i].gender << " " << stu[i].age << " ";
            outFile << stu[i].birthday[0] << "-" << stu[i].birthday[1] << "-" << stu[i].birthday[2] << " ";
            outFile << stu[i].score1 << " " << stu[i].score2 << endl;
        }
        outFile.close();    // 关闭文件
    } else {
        cout << "Unable to open file!" << endl;
    }
    
    return 0;
}

这段代码定义了一个名为`student`的结构体，包含了学生信息的各个字段。然后定义了一个长度为5的`stu`数组，将实训12第2题定义的学生数据存入其中。接着打开一个输出文件流，将学生数据写入磁盘文件`students.txt`中，最后关闭文件流。