问打印伪多维数组时出错

EN

#include <iostream>

#define Row_sz 3
#define Col_sz 4

using namespace std;

int main()
{
    int row, col;
    int arr[Row_sz*Col_sz];

    cout<<"Printing a multi-dimensional array."<<endl;
    do{
        cout<<"Enter the number of rows: "<<endl;
        cin>>row;
    }while(row>Row_sz||row<0);
    do{
        cout<<"Enter the number of columns: "<<endl;
        cin>>col;
    }while(col>Col_sz||col<0);

    for (int x=0;x<row;x++){
        for(int y=0;y<col;y++){
            cout<<"Enter the value: "<<endl;
            cin>>arr[x*y];
        }

    }
    cout<<"The array matrix: "<<endl;
    for (int x=0;x<row;x++){
        for(int y=0;y<col;y++){
            cout<<arr[x*y]<<" ";
        }
        cout<<endl;
    }
}

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