How can I modify my program to use dynamic array in which theprogram asks how ma

Question

How can I modify my program to use dynamic array in which theprogram asks how many rows the plane has, and will handle that manyrows instead of assuming that the plane has 7 rows that I currentlyhave in the program. I tried several ways but kept on gettingerrors. Here's the program:
#include <iostream> #include <cstdlib> #include <cstddef>
const int NO_ROWS = 7; typedef char SeatRow[4]; typedef SeatRow Seating[NO_ROWS]; Seating seatAssignment;

int main()
{   using namespace std;   Seating plan;   int row;   char seat;   int seatNo;   int r;   int s;
  //Empty seats get initialized   for(r = 0; r < NO_ROWS; r++)   for(s = 0; s < 4; s++)   plan[r][s] = char ('A' + s);    cout << "Airlines Seat ReservationProgram. "    << "Reserved seats are marked'X'. Others seats are available. ";
//displats seating   for (r = 1; r < NO_ROWS; r++)   {    for (s = 0; s < 4; s++)    {    cout << plan[r] [s] <<"";    if(s ==1)    cout << " ";    }    cout << endl;    }    char ans = 'a';    while (ans !='q' && ans !='Q')    {    cout << "Airlines "    << "Seat ReservationProgram. "    << "Reserved Seats are marked 'X'.Others seats are available. ";    cout <<"Please enter your request in theform "3 C" for Row 3, SeatC ";    cout<< "There are " << NO_ROWS<< " rows. Seats are A, B, C, D. ";    cin >> row >> seat;        seatNo = seat - 'A';    if('X' != plan[row] [seatNo])    plan[row][seatNo] = 'X';    else    cout << "****That seat is alreadytaken****. ****No assignment made****. ";
//displays current seating plan   for(r = 1; r < NO_ROWS; r++)   {    for (s = 0; s < 4; s++)    {    cout << plan[r][s] << "";    if(s == 1)    cout << " ";    }    cout << endl;   }    cout << "Please enter Q or q to quit, pressany other key to continues ";    cin >> ans; }   return 0; } Here's the program:
#include <iostream> #include <cstdlib> #include <cstddef>
const int NO_ROWS = 7; typedef char SeatRow[4]; typedef SeatRow Seating[NO_ROWS]; Seating seatAssignment;

int main()
{   using namespace std;   Seating plan;   int row;   char seat;   int seatNo;   int r;   int s;
  //Empty seats get initialized   for(r = 0; r < NO_ROWS; r++)   for(s = 0; s < 4; s++)   plan[r][s] = char ('A' + s);    cout << "Airlines Seat ReservationProgram. "    << "Reserved seats are marked'X'. Others seats are available. ";
//displats seating   for (r = 1; r < NO_ROWS; r++)   {    for (s = 0; s < 4; s++)    {    cout << plan[r] [s] <<"";    if(s ==1)    cout << " ";    }    cout << endl;    }    char ans = 'a';    while (ans !='q' && ans !='Q')    {    cout << "Airlines "    << "Seat ReservationProgram. "    << "Reserved Seats are marked 'X'.Others seats are available. ";    cout <<"Please enter your request in theform "3 C" for Row 3, SeatC ";    cout<< "There are " << NO_ROWS<< " rows. Seats are A, B, C, D. ";    cin >> row >> seat;        seatNo = seat - 'A';    if('X' != plan[row] [seatNo])    plan[row][seatNo] = 'X';    else    cout << "****That seat is alreadytaken****. ****No assignment made****. ";
//displays current seating plan   for(r = 1; r < NO_ROWS; r++)   {    for (s = 0; s < 4; s++)    {    cout << plan[r][s] << "";    if(s == 1)    cout << " ";    }    cout << endl;   }    cout << "Please enter Q or q to quit, pressany other key to continues ";    cin >> ans; }   return 0; } #include <iostream> #include <cstdlib> #include <cstddef>
const int NO_ROWS = 7; typedef char SeatRow[4]; typedef SeatRow Seating[NO_ROWS]; Seating seatAssignment;

int main()
{   using namespace std;   Seating plan;   int row;   char seat;   int seatNo;   int r;   int s;
  //Empty seats get initialized   for(r = 0; r < NO_ROWS; r++)   for(s = 0; s < 4; s++)   plan[r][s] = char ('A' + s);    cout << "Airlines Seat ReservationProgram. "    << "Reserved seats are marked'X'. Others seats are available. ";
//displats seating   for (r = 1; r < NO_ROWS; r++)   {    for (s = 0; s < 4; s++)    {    cout << plan[r] [s] <<"";    if(s ==1)    cout << " ";    }    cout << endl;    }    char ans = 'a';    while (ans !='q' && ans !='Q')    {    cout << "Airlines "    << "Seat ReservationProgram. "    << "Reserved Seats are marked 'X'.Others seats are available. ";    cout <<"Please enter your request in theform "3 C" for Row 3, SeatC ";    cout<< "There are " << NO_ROWS<< " rows. Seats are A, B, C, D. ";    cin >> row >> seat;        seatNo = seat - 'A';    if('X' != plan[row] [seatNo])    plan[row][seatNo] = 'X';    else    cout << "****That seat is alreadytaken****. ****No assignment made****. ";
//displays current seating plan   for(r = 1; r < NO_ROWS; r++)   {    for (s = 0; s < 4; s++)    {    cout << plan[r][s] << "";    if(s == 1)    cout << " ";    }    cout << endl;   }    cout << "Please enter Q or q to quit, pressany other key to continues ";    cin >> ans; }   return 0; }

Explanation / Answer

I'm not too familiar with C++ but in C it sounds like alinked-list would be your best data structure. Using C++, I thinkyou should look into the Vector class provided in the StandardTemplate Library. The Vector class has built in methods to insert,delete, etc. and basically makes a static structure dynamic. CheckWikipedia for some examples.

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