Question

C++

Simulate movement of text object across the screen using sleep(1); and  cout << "\033[2J\033[1;1H" //to clear screen These are non-negotiable. Have to use sleep(1) and make it work, per instructor instruction.

The code I have written (below) clears the screen but does not show the movement of the object. Please help! It is supposed to show the object moving horizontally or vertically.

#include
#include
#include
#include
using namespace std;

int main()
{
   enum Direction {Horizontal = 'H', Vertical = 'V'};
  
   char usr_direction;
   char response;  
  
   string triangle;
   string down;
   string right;
  
   const int move = 12; //will indicate how many to move
   int height; //number of lines of object
   int b = 1;
  
   do
   {
      
       cout << "Enter the height of the structure: ";
       cin >> height;
          
       cout << "Which direction? H for Horizontal or V for vertical: ";
       cin >> usr_direction;
       usr_direction = toupper(usr_direction);
  
      
      
           for (int i = 1; i <= height; i++) //triangle
           {
      
               for(int j = 0; j<= height-i; j++)
               {
                   triangle += " ";
               }
               for(int k = 0; k != 2*i-1; k++)
               {
                   triangle +='*';
               }
          
           triangle += '\n';
           }
           cout << triangle << endl;
      
           while( b <= move)
           {
               sleep(1); // wait for one second before clearing
               cout << "\033[2J\033[1;1H"; //clear screen
              
               switch (usr_direction)
               {
                   case 'H':                      
                       right = "/t"; // Horizontal
                       cout << right << triangle;
                      
                       b++;
              
                       break;
          
                   case 'V':
                       down = "\n"; // Vertical
                       cout << down << triangle;

                      
                       b++;
              
                       break;
          
                   default:
                       cout << "Inappropriate response.";
               }

           }
      
      
       cout << "Do you want to replay? Y/N: ";
       cin >> response;
      
   }while(response == 'Y' || response == 'y');
  
  
  
  
   return 0;
}

Answer 1

Program

Successfully executed on ubuntu 18.10

#include<iostream>
#include <unistd.h>//for sleep() in linux
#include <sstream>//for getline()
using namespace std;

int main()
{
   enum Direction {Horizontal = 'H', Vertical = 'V'};

   char usr_direction;
   char response;

   string triangle;
   string down;
   string right;


   const int move = 12; //will indicate how many to move
   int height; //number of lines of object
   int b = 1;

   do
   {
    
       cout << "Enter the height of the structure: ";
       cin >> height;
        
       cout << "Which direction? H for Horizontal or V for vertical: ";
       cin >> usr_direction;
       usr_direction = toupper(usr_direction);

    
    
           for (int i = 1; i <= height; i++) //triangle
           {
    
               for(int j = 0; j<= height-i; j++)
               {
                   triangle += " ";
               }
               for(int k = 0; k != 2*i-1; k++)
               {
                   triangle +='*';
               }
        
           triangle += '\n';
           }
           cout << triangle << endl;
    
           while( b <= move)
           {
               sleep(1); // wait for one second before clearing
               cout << "\033[2J\033[1;1H"; //clear screen
            
               switch (usr_direction)
               {
                   case 'H':   
{
// \t works for only first line of string. so we will do few changes below
       istringstream f(triangle);
       string line;
       triangle="";//empty triangle
       //WE will get each line of triangle and shift it by \t and again add each line to triangle and we will get new triangle wiht \t.
                                while (getline(f, line)) {
                              
/* initialize triangle lines everytime with \t concatinated */
                         line="\t"+line;
                     triangle+=line+"\n";
                               }
                         right=triangle;//initialize right by triangle (you can also print triangle directly)
                                   cout << right ; // Horizontal

                             b++;
                       break;
          }
                   case 'V':
                 
/* initialize triangle everytime with \n concatinated */
                       triangle = "\n"+triangle; // Vertical
                       down=triangle;
                       cout << down ;

                    
                       b++;
            
                       break;
        
                   default:
                       cout << "Inappropriate response.";
               }

           }
    
    
       cout << "Do you want to replay? Y/N: ";
       cin >> response;
    
   }while(response == 'Y' || response == 'y');




   return 0;
}

Output

I have skipped complete output as it was too long , but was similar.You can see yourself by running program.