Program to draw a spiral rotating clockwise at the center of the screen

Code for Program to draw a spiral rotating clockwise at the center of the screen in C++ Programming

 

 

 

 # include <iostream.h>
 # include <fstream.h>
 # include <stdlib.h>
 # include <string.h>
 # include <conio.h>

 # define LEFT  0
 # define UP    1
 # define RIGHT 2
 # define DOWN  3

 constchar get_digit(constchar);


 int main( )
    {
       clrscr( );

       fstream File("CP-06.txt",ios::in|ios::nocreate);

       if(!File)
      {
         cout<<"\n Unable to open the input file."<<endl;
         cout<<"\n Press any key to exit.";

         getch( );
         exit(EXIT_FAILURE);
      }

       char Last_digit='0';
       char Input[85]={NULL};
       char Screen[25][80]={NULL};

       int direction=0;
       int length_of_spiral=0;

       File.getline(Input,80);

       direction=atoi(Input);

       strset(Input,NULL);

       File.getline(Input,80);

       length_of_spiral=atoi(Input);

       int i=0;
       int j=0;
       int k=1;
       int x=12;
       int y=39;
       int number_of_digits_in_a_direction=1;

       for(i=0;i<25;i++)
      {
         for(j=0;j<80;j++)
        Screen[i][j]='.';
      }

       Screen[x][y]=Last_digit;

       switch(direction)
      {
         case LEFT  : y-=2;
              break;

         case UP    : x-=2;
              break;

         case RIGHT : y+=2;
              break;

         case DOWN  : x+=2;
              break;
      }

       do
      {
         for(i=0;i<4;i++)
        {
           for(j=0;j<number_of_digits_in_a_direction;j++)
              {
             Screen[x][y]=get_digit(Last_digit);
             Last_digit=Screen[x][y];
             k++;

             if(j==(number_of_digits_in_a_direction-1))
                {
                   direction++;

                   if(direction==4)
                  direction=0;
                }

             if(k==length_of_spiral)
                break;

             switch(direction)
                {
                   case LEFT  : y-=2;
                        break;

                   case UP    : x-=2;
                        break;

                   case RIGHT : y+=2;
                        break;

                   case DOWN  : x+=2;
                        break;
                }
              }

           if(k==length_of_spiral)
              break;

           if(i==1)
              number_of_digits_in_a_direction++;
        }

         if(k==length_of_spiral)
        break;

         number_of_digits_in_a_direction++;
      }
       while(1);

       window(40,13,41,14);
       textbackground(BLUE);
       textcolor(WHITE);
       cprintf("0");

       window(1,1,1,1);

       for(i=0;i<25;i++)
      {
         for(j=0;j<80;j++)
        cout<<Screen[i][j];
      }

       getch( );
       return 0;
    }

 /*************************************************************************///------------------------  get_digit(const char)  ----------------------///*************************************************************************/constchar get_digit(constchar Last_digit)
    {
       char Next_digit=NULL;

       switch(Last_digit)
      {
         case'0' : Next_digit='1';
            break;

         case'1' : Next_digit='2';
            break;

         case'2' : Next_digit='3';
            break;

         case'3' : Next_digit='4';
            break;

         case'4' : Next_digit='5';
            break;

         case'5' : Next_digit='6';
            break;

         case'6' : Next_digit='7';
            break;

         case'7' : Next_digit='8';
            break;

         case'8' : Next_digit='9';
            break;

         case'9' : Next_digit='0';
            break;
      }

       return Next_digit;
    }