#include<iostream>
using namespace std;
const int SLEN = 30;
struct student
{
    char fullname[SLEN];
    char hobby[SLEN];
    int ooplevel;
};

//getinfo ()有两个参数:指向学生结构数组第一个元素的指针和表示数组元素数的int。
//该功能请求并存储有关学生的数据。它在填充数组时或遇到学生姓名的空行时终止输入。函数返回实际填充的数组元素数。
int getinfo(student pa[], int n);

//display 1 ()以学生结构为参数并显示其内容
void display1(student st);

//display 2 ()以学生结构的地址作为参数并显示结构的内容
void display2(const student*ps);

//display 3 ()将学生结构数组的第一个元素的地址和数组元素的数量作为参数，并显示结构的内容
void display3(const student pa[], int n);

int main()
{
    cout << "输入类别大小: ";
    int class_size;
    cin >> class_size;
    while (cin.get() != '\n')
        continue;

    student *ptr_stu = new student[class_size];
    int entered = getinfo(ptr_stu, class_size);
    for (int i = 0; i < entered; i++)
    {
        display1(ptr_stu[i]);
        display2(&ptr_stu[i]);
    }
    display3(ptr_stu, entered);
    delete[]ptr_stu;
    cout << "完成(Done!)\n";


    system("pause");
    return 0;
}

int getinfo(student pa[], int n)              //char fullname;hobby,,ooplevel
{
    int i;
    for (i = 0; i < n; i++)
    {
        cout << "第" << i + 1 << "个学员的姓名:";
        cin.get(pa->fullname, SLEN).get();            //输入学员姓名
        int j;
        for (j = 0; pa->fullname[j] != '\0'; j++)        //检测学员姓名有无空格 有空格 退出循环
        {
            if (pa->fullname[j] == ' ')
                break;
        }
        if (pa->fullname[j] != '\0')             //如果fullname[j]变量是空格 就退出循环
            break;                                             
        
        cout << "第" << i + 1 << "个学员的爱好:";
        cin.get(pa->hobby, SLEN).get();
        cout << "第" << i + 1 << "个学员的分数:";
        while (!(cin >> pa->ooplevel))
        {
            if (cin.fail())
                cin.clear();
                cin.sync();
                cout << "输入错误!重新输入:";
        }
        cin.get();
        
    }
    return i;
}

void display1(student st)           //char fullname;hobby,,ooplevel
{
    cout << "学员姓名: " << st.fullname << endl;
    cout << "学员爱好: " << st.hobby << endl;
    cout << "学员分数: " << st.ooplevel << endl;
}

void display2(const student*ps)
{
    cout << "学员姓名: " << ps->fullname << endl;
    cout << "学员爱好: " << ps->hobby << endl;
    cout << "学员分数: " << ps->ooplevel << endl;

}
void display3(const student pa[], int n)
{
    for (int i = 0; i < n; i++)
    {
        cout << "学员姓名: " << pa[i].fullname << endl;
        cout << "学员爱好: " << pa[i].hobby << endl;
        cout << "学员分数: " << pa[i].ooplevel << endl;
    }

}

多谢指教..