seat pattern

[1051109210]

im suppose to do a "airplane sitting" program

1 a b c d
2 a b c d
3 a b c d
(till 7)

den if i ask a user to type in their seats...

1 a b x d
2 a x c d
3 a b c d
(till 7)

pick seats will become "x"

now im stuck...

#include <iostream>
#include <cstring>
using namespace std;

int main()
{
    int i,n,len;
    char x[3];
    char status[15];
    
    cout<<"This is an airplane passengers seats program"<<endl<<endl;
    
    for(n=1;n<=7;n++){
    cout<<n<<" \tA\tB\tC\tD"<<endl<<endl;
    }

    cout<<"Please enter your seat accordingly : ";
    cin.getline(x,3);
    cout<<endl;
    len=strlen(x);
   
   // for (i=0;i<=len;i++)
   // x[i]=toupper(x[i]);

    for(int j=1;j<=7;j++){
    cout<<j<<" \tA\tB\tC\tD"<<endl<<endl;
    }
        
    
    
    
    
    cout<<"Thank you for using this program"<<endl;
    cout<<"Have a nice day"<<endl;
    
    system("pause");
    return 0;
}