Q:

C program to design flying characters Screen Saver

mahmoud2506
Save to bookmark
|
2022-05-03
|
  150 
0

C program to design flying characters Screen Saver

This C program will display flying characters just like a Screen Saver, here is a set of characters that will access randomly and position on the screen will also random and on the random position program will display random character from assigned set of characters until user does not press any key.

 

C programming, exam questions, C programming exam-questions,
login and add your own answer to this question

All Answers

mahmoud2506
2022-05-03
need an explanation for this answer? contact us directly to get an explanation for this answer

Flying Characters as Screen Saver using C program

/*C program to design flying characters Screen Saver.*/

#include <stdio.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>

/*will return character based on passed number*/
char getCHAR(int n)
{
    char ok[] = "~!@#$%^&*:;'",{}|<>=";
    return ok[n];
}

/*function to identify that any key hit by the keyboard*/
int kbhit(void)
{
    struct termios oldt, newt;
    int ch;
    int oldf;

    tcgetattr(STDIN_FILENO, &oldt);
    newt = oldt;
    newt.c_lflag &= ~(ICANON | ECHO);
    tcsetattr(STDIN_FILENO, TCSANOW, &newt);
    oldf = fcntl(STDIN_FILENO, F_GETFL, 0);
    fcntl(STDIN_FILENO, F_SETFL, oldf | O_NONBLOCK);

    ch = getchar();

    tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
    fcntl(STDIN_FILENO, F_SETFL, oldf);

    if (ch != EOF) {
        ungetc(ch, stdin);
        return 1;
    }

    return 0;
}

/*move cursor on specified position on screen*/
void gotoxy(int x, int y)
{
    printf("%c[%d;%df", 0x1B, y, x);
}

int main(void)
{
    int x, y;
    long int i, j;
    i = j = 0;

    x = 1;
    y = 20;
    system("clear");

    /*program will run until any key hit*/
    while (!kbhit()) {
        x = rand() % ((150 - 1 + 1) + 1);
        y = rand() % ((50 - 1 + 1) + 1);
        gotoxy(x, y);
        printf("%c", getCHAR(rand() % ((20 - 1 + 1) + 1)));
        fflush(stdout);
        ++i;
        if (i == 10000) {
            ++j;
            i = 0;
        }
        if (j == 100000) {
            i = 0;
        }
        if (j <= 100)
            usleep(30000);
        if (j <= 1000)
            usleep(3000);
        if (j <= 10000)
            usleep(300);
    }
    return 0;
}

Output:

#!        ;             %                          :     @   ^                 ,
           %!                            {              ^  |               =   ~
     =            %      @  %        ;>*              !  }      @  ~           %
                                                       } {   ,                 {
!       {         "    $       %'  "            >  @                           *
    %                     '                       ~                            %
         ^                                                                ,    #
                       < ;                                ^        '   ^       *
               %                                                 #  :          !
          $        $                                @          *  :            #
    # "                  ,                        }    '                       |
                                                                               #
'                                        #   $                                 #
' &           %            }          {                                   :    $
        >     =            {      #                              {             $
    }                 < #               *      :               %   @           }
                              = >                   %*                         ,
                        <  &            "    <                        < "!     <
                                  *                                            &
             @                                                                 ;
      }   >                                                                    <
        }                      ; ,                      :      %               $

 

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (1)

C language important programs ( Advance Programs )
This question belongs to these collections

Similar questions

need a help?

find thousands of online teachers now
C program to Set Computer System IP Address in Lin... >>
<< C program to design a TIC TAC TOE game...