Ncurses

How to work with NCURSES in Linux...

NCURSES is a clone of the original system V curses. It’s a free attributable library; fully capable with older version of curses. In short it’s a library of functions that manages an application’s display on character cell terminals.

 In c++ we cannot get different shapes to the screen because standard c++ does not provide enough functionalities in order to manipulate the text screen outputs.To overcome this problem NCURSES was developed. Ncurses library provides a set of calls that enable the programmer to do various screen and keyboard manipulations in the linux environment.

In order to work with ncurses you should define ncurses.h header file.

Simple ncurses program :

#include<ncurses.h>

Int main()

{

            initscr();

            printw(“Hello world”);

            getch();

            endwin();

}

NCURSES MOST USEFULL SHAPES

CODE:

                                                        void triangle(int row,int col,int height)

                                                           {

                                                               for(int i=0;i<=height;i++)

                                                               {

                                                                   for(int  j=(col-i);j<=(col+i);j++)

                                                                        {

                                                                           move(row+i,j);

                                                                            printw(“*”);

                                                                        }

                                                               }

                                                           }

CODE:

                                                        void triangle(int row,int col,int height)

                                                           {

                                                               for(int i=0;i<=height;i++)

                                                               {

                                                                   for(int  j=(col-i);j<=(col+i);j++)

                                                                        {

                                                                           move(row-i,j);

                                                                            printw(“*”);

                                                                        }

                                                               }

                                                           }

CODE:

                                                        void triangle(int row,int col,int height)

                                                           {

                                                               for(int i=0;i<=height;i++)

                                                               {

                                                                   for(int  j=(col-i);j<=(col+i);j++)

                                                                        {

                                                                           move(j,row-i);

                                                                            printw(“*”);

                                                                        }

                                                               }

                                                           }

                                                                         CODE:

                                                        void triangle(int row,int col,int height)

                                                           {

                                                               for(int i=0;i<=height;i++)

                                                               {

                                                                   for(int  j=(col-i);j<=(col+i);j++)

                                                                        {

                                                                           move(j,row+i);

                                                                            printw(“*”);

                                                                        }

                                                               }

                                                           }

CODE:

                                                               void  Rec(int row,int col,int height,int width)

                                                                        {

                                                                          for(int i=row;i<=row+height;i++)

                                                                          {

                                                                             for(int j=col;j<=col+width;j++)

                                                                               {

                                                                                    move(i,j);

                                                                                    printw(“*”);

                                                                               }

                                                                          }

                                                                        }

                                                                         CODE:

                                                              void  Trap(int row,int col,int height,int width)

                                                                        {

                                                                          for(int i=row;i<=row+height;i++)

                                                                          {

                                                                             for(int j=col;j<=col+width+i;j++)

                                                                               {

                                                                                    move(i,j);

                                                                                    printw(“*”);

                                                                               }

                                                                          }

                                                                        }

CODE:

                                                              void  Romb(int row,int col,int height,int width)

                                                                        {

                                                                          for(int i=row;i<=row+height;i++)

                                                                          {

                                                                             for(int j=(col+i);j<=col+width+i;j++)

                                                                               {

                                                                                    move(j,i);

                                                                                    printw(“*”);

                                                                               }

                                                                          }

                                                                        }

CODE:

                                                              void  Romb(int row,int col,int height,int width)

                                                                        {

                                                                          for(int i=row;i<=row+height;i++)

                                                                          {

                                                                             for(int j=(col+i);j<=col+width+i;j++)

                                                                               {

                                                                                    move(i,j);

                                                                                    printw(“*”);

                                                                               }

                                                                          }

                                                                        }

CODE:

                                                            void  Romb(int row,int col,int height,int width)

                                                                        {

                                                                          for(int i=row;i<=row+height;i++)

                                                                          {

                                                                             for(int j=(col-i);j<=col+width-i;j++)

                                                                               {

                                                                                    move(row+i,col+j);

                                                                                    printw(“*”);

                                                                               }

                                                                          }

                                                                        }

             Moving asterisks(*) in ncurses

Here arrow shows the direction.

Code:

void moving(int row,int col,int size)

{

     for(int i=0;i<size;i++)

    {

       refresh();

       move(row,col+i);

       printw(“*”);

       for(int r=0;r<3000000;r++);

       refresh();

    }

}

Code:

void moving(int row,int col,int size)

{

     for(int i=0;i<size;i++)

    {

       refresh();

       move(row,col-i);

       printw(“*”);

       for(int r=0;r<3000000;r++);

       refresh();

    }

}

Code:                                

 void moving(int row,int col,int size)

{

     for(int i=0;i<size;i++)

    {

       refresh();

       move(row-i,col);

       printw(“*”);

       for(int r=0;r<3000000;r++);

       refresh();

    }

}

Code:                                

 void moving(int row,int col,int size)

{

     for(int i=0;i<size;i++)

    {

       refresh();

       move(row+i,col);

       printw(“*”);

       for(int r=0;r<3000000;r++);

       refresh();

    }

}

Code:                                

 void moving(int row,int col,int size)

{

     for(int i=0;i<size;i++)

    {

       refresh();

       move(row+i,col+i);

       printw(“*”);

       for(int r=0;r<3000000;r++);

       refresh();

    }

}

Code:                                

 void moving(int row,int col,int size)

{

     for(int i=0;i<size;i++)

    {

       refresh();

       move(row+i,col-i);

       printw(“*”);

       for(int r=0;r<3000000;r++);

       refresh();

    }

}

Code:                                

 void moving(int row,int col,int size)

{

     for(int i=0;i<size;i++)

    {

       refresh();

       move(row-i,col-i);

       printw(“*”);

       for(int r=0;r<3000000;r++);

       refresh();

    }

}

Code:                                

 void moving(int row,int col,int size)

{

     for(int i=0;i<size;i++)

    {

       refresh();

       move(row-i,col+i);

       printw(“*”);

       for(int r=0;r<3000000;r++);

       refresh();

    }