关于二维数组的问题

// Note:Your choice is C++ IDE
#include <iostream>
using namespace std;

void ChDay(int i);

int main()
{
    typedef struct FUN
    {
        int a;
        int b;
        int c;
        double d;
    }obj;
   
    obj pl[5];
    for(int i = 0; i < 5; i++)
    {
        if(0 == i)
        {
            cout<<"————  信息输入  ————"<<endl;
        }
        
        ChDay(i);
            
        cout<<"早上:";
        cin>>pl[i].a;
        cout<<"中午:";
        cin>>pl[i].b;
        cout<<"晚上:";
        cin>>pl[i].c;
        if(4 == i)
        {
            cout<<"输入完毕"<<endl;
        }
    }
   
    cout<<endl;
   
    for(int j = 0; j < 5; j++)
    {
        if(0 == j)
        {
            cout<<"————  信息显示  ————"<<endl;
        }
        
        ChDay(j);
        pl[j].d = (pl[j].a + pl[j].b + pl[j].c)/3;   
        cout<<"早上:"<<pl[j].a<<endl;
        cout<<"中午:"<<pl[j].b<<endl;
        cout<<"晚上:"<<pl[j].c<<endl;
        cout<<"晚上:"<<pl[j].d<<endl;

        if(4 == i)
        {
            cout<<"显示完毕"<<endl;
        }
    }
   
    system("pause");
    return 0;
}

void ChDay(int i)
{
    switch(i)
        {
            case 0:cout<<"* * * * 星期一 * * * * "<<endl;break;
            case 1:cout<<"* * * * 星期二 * * * * "<<endl;break;
            case 2:cout<<"* * * * 星期三 * * * * "<<endl;break;
            case 3:cout<<"* * * * 星期四 * * * * "<<endl;break;
            case 4:cout<<"* * * * 星期五 * * * * "<<endl;break;
        }
}