please help! in moving an object using C

[palani12kumar]

hi.
i want to draw an object in C, and then i want to move the object according to the user's input. That is if the user presses the left arrow, the object should move left from its current position and if the user press right arrow, it should move to right and so with up and down keys. how to do this?
Can any one help me!!!!
thanks in advance.....

[RedSon]

hi.
i want to draw an object in C, and then i want to move the object according to the user's input. That is if the user presses the left arrow, the object should move left from its current position and if the user press right arrow, it should move to right and so with up and down keys. how to do this?
Can any one help me!!!!
thanks in advance.....

First you need to draw a shape (its a shape not an object, objects are special in C/C++), say you draw it at 50, 50 then you will have to detect keyboard input, when the user presses the left or right arrow button you will draw the shape at 49, 50 and then repaint the window.

[palani12kumar]

How to detect the user input. that is, how to know which key was pressed by the user?/ i tried to find by checking the ascii value of those keys.. but i cant. Is there any function to do this?/

[Savage]

How to detect the user input. that is, how to know which key was pressed by the user?/ i tried to find by checking the ascii value of those keys.. but i cant. Is there any function to do this?/

ASCII values exist

LEFT 75
RIGHT 77
UP 72
DOWN 80

I know that in table those represent char's like K but it works.

You will need to use switch:

like:

contol=getch();
switch(control)
{
  case UP:move object up;
                break;
  case DOWN: move object down;
                      break;
  case LEFT move object left.
                   break;
  case RIGHT:move object right;
                    break;
}

Note:All this must be inside do while loop which will terminate if user press key
which you have assigned for exit.


Savage

[palani12kumar]

Thank you for your kind help

[RedSon]

But since you are using a graphical device, you need to look and see how input is passed to the program. In windows the active window gets KEYDOW and KEYUP messages from the operating system. These messages are passed with the value of the key that is pressed.

[ilikepython]

Kind off topic but since I'm new to C, I have to ask a question. How do you actually "draw" shapes and images and stuff with C. In other words how do you display something other than text? Is there a special module you have to use or is it really complicated? I was just wondering because I wrote some games with python with pygame.

Thanks in advance

[RedSon]

Kind off topic but since I'm new to C, I have to ask a question. How do you actually "draw" shapes and images and stuff with C. In other words how do you display something other than text? Is there a special module you have to use or is it really complicated? I was just wondering because I wrote some games with python with pygame.

Thanks in advance

First off, an off topic post is considered hijacking and is a no-no. But since you were polite about I'm going to let it slide. Its nice to see someone who is actually polite and has some etiquette so good job!

There are libraries in many languages to "draw" things to the display. In windows there are complete technologies that allow you to do this (GDI is one).

[boyjuky]

hehe........... ....