Thread: drawing lines and rectangles in c++

hi im making a program that dependent on the users imputs and the calculations afterward displays a grid.
the trouble is that i am not sure how to draw lines or rectangles i know that i need to put co-ordinates but i dont really know how to make the line draw on screen.
oh and another question is my program starts with this code

Code:

// PROGRAM TO WORK MATERIALS OUT FOR A CEILING

#include <iostream>
 
using namespace std;
bool YesNo(char* prompt)
{
      cout << prompt;
      char yesno;
      cin.ignore(cin.rdbuf()->in_avail());
      yesno = cin.get();
      cin.ignore(cin.rdbuf()->in_avail());
      return(yesno == 'Y' || yesno == 'y');
}

int main()
{
int long_wall;
int short_wall;
int atile, btile, totaltile;
int runnersinglerow; 
int rsr, rowsofrunner,totalrunner,theover;
int a1200a, a1200,b1200a, b1200, total1200;
int a600,a600a, b600,b600a, total600;

do {
cout<< "please enter the the length of the longest wall if the\n";
cout<<" sofit is concerete otherwise enter the length of the wall\n";
cout<<"opposite the joists.ok ive fixed it now it will work every time :) i hope lol\n";
cin>>long_wall;
cin.ignore();

cout<< "now enter the lenght of the other wall.\n";
cin>>short_wall;
cin.ignore();

       rsr=long_wall%3600;
       runnersinglerow=long_wall/3600;
       rowsofrunner=short_wall/1200;
       theover=rowsofrunner/2; 
           
     if (rsr<1800)
       totalrunner=runnersinglerow*rowsofrunner+theover;       
       
       if (rsr>1800)
       runnersinglerow++;    
       totalrunner=runnersinglerow*rowsofrunner;
       cout<<"you will need... "<<totalrunner<<" runners\n";
          
          
           a1200=(long_wall/600);
           b1200=(short_wall/1200+1);
           total1200=a1200*b1200;
           cout<<"you will need... "<<total1200<<" 1200 bars\n";
              
              
               a600=long_wall/600+1;
               b600=short_wall/1200+1;
               total600=a600*b600;
               cout<<"you will need... "<<total600<<" 600 bars\n";
                    
                    
                    atile=long_wall/600+1;
                    btile=short_wall/600+1;
                    totaltile=atile*btile;
                    cout<<"you will need... "<<totaltile<<" tiles\n";
                    
cout<<"dont forget this is the proto type lol\n";
}

while(YesNo("Restart? (Y / Any key) "));
      
      return 0;
}

ok so my code works fine but now is it possible to make this same program display graphics? thank you in advance
oh and by the way just so people dont think im a stealer the yes no part of the code was not wrote by me niether do i at this point really understand it.