Program must be written in c++. You run four computer labs, Each lab contains co

Question

Program must be written in c++.

You run four computer labs, Each lab contains computer stations that are numbered as shown in the table below:

Lab Number

Computer Station Numbers

1

1 - 5

2

1 - 6

3

1 - 4

4

1 - 3

Each user has a unique five-digit ID number. Whenever a user logs on, the user’s ID, lab number, and the computer station number are transmitted to your system. For example, if user 49193 logs onto station 2 in lab 3, then your system receives (49193, 2, 3) as input data. Similarly, when a user logs off a station, then your system receives the lab number and the computer station number.

Write a computer program that could be used to track, by lab, which user is logged onto which computer. For example, if user 49193 is logged into station 2 in lab 3 and user 99577 is logged into station 1 of lab 4, then your system might display the following:

Lab# Computer Stations

1 1: empty 2: empty 3: empty 4: empty 5: empty

1 1: empty 2: empty 3: empty 4: empty 5: empty 6:empty

3 1: empty 2: 49193 3: empty 4: empty

4 1: 99577 2: empty 3: empty

Create a menu that allows the administrator to stimulate the transmission of information by manually typing in the login of logoff data. Whenever someone logs in or out, the display should be updated. Also write a search option so that the administrator can type in a user ID and the system will output what lab and station number that user is logged into, or “None” if the user ID is not logged into any computer station.

You should use a fixed array of length 4 for the labs. Each array entry points to a dynamic array that stores the user login information for each respective computer station.

The structure is shown in the figure below. This structure is sometimes called a ragged array since the columns are of unequal length.

Lab Number

Computer Station Numbers

1

1 - 5

2

1 - 6

3

1 - 4

4

1 - 3

Explanation / Answer

#include <iostream>
#include <cstdlib>
using namespace std;
int **dynArray(int row, int cols)
{
int **myPtr;
int lab[4];
myPtr = new int *[row];
for(int i = 0; i < row; i++)
myPtr[i] = new int[lab[i]];
for(int i = 0; i<row ; i++)
if(myPtr[i] == 0)
cout<<"empty";
return myPtr;
}
void getinput(int ID,int &Station,int &labnumb)
{
cout<<" Enter your ID number: "<<endl;
cin>>ID;
cout<<" Enter your station number: "<<endl;
cin>>Station;
cout<<" Enter your lab number: "<<endl;
cin>>labnumb;
return;
}
void logout(int ID,int &Station,int &labnumb)
{
cout<< "You have been logged out."<<endl;
return;
}
void login(int **dynArray,int ID,int &Station,int &labnumb)
{
dynArray[labnumb][Station] = ID;
return;
}
bool search(int **dynArry,int ID,int &row,int &cols,int lab[])
{
cout<<"Enter user ID to check: "<<endl;
cin>>ID;
bool found = false;
for(int i = 0; i < row;i++)
for(int j = 0; j < lab[i];j++)
if(ID == dynArry[i][j])
{
found = true;
row = i;
cols = j;
}
return found;
}
void Menu(int **dynArray,int ID,int &Station,int &labnumb,int lab[])
{
int choice;
cout<<"Enter 1 for login, 2 for search,3 for exit. "<<endl;
cin>>choice;
if(choice == 1)
login(dynArray,ID,Station,labnumb);
if(choice == 2)
search(dynArray,ID,Station,labnumb,lab);
if(choice == 3)
exit(0);
}
int main()
{
int lab[4];
lab[0] = 5;
lab[1] = 6;
lab[2] = 4;
lab[3] = 3;
int **labmain;
labmain = new int*[4];
for(int i = 0; i <4 ; i++)
{
*(labmain + i) = new int;
}
labmain = dynArray(4,7);
int ID,Station,labnumb;
Menu(dynArray,ID,Station,labnumb,lab);
system("PAUSE");
return 0;
}

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