Thread: help me with this c graphics program

Originally Posted by arunstar008

this is the original program can you please alter this with my requirement
my requirement is to set a user input for the height of the kite while flying

Kind of unlikely that someone will do it for you, but we will try and help you do it yourself.

The most basic way to get user input is with the scanf() or fgets() command. Have you used these before?

A possible problem here is those commands may not work in conjunction with <graphics.h>. <graphics.h> is an old Borland thing, meaning most people are probably not familiar with it, so if you cannot use scanf(), then you probably need to use some command peculiar to it, but unfortunately finding someone who remembers that stuff may be hard.

Is the output drawn in the text console, or in a separate window? If it is in a separate window, you can probably use scanf() in a text console where you start the program from.

Also: PLEASE INDENT YOUR CODE. IT IS MUCH MUCH EASIER TO READ THAT WAY AND SOMETHING WE ASK OF EVERYONE HERE AT CBOARD. For example (and notice, all of this is indended one tabspace already because it is inside main():

Code:

	getimage(100,75,150,130,kite);
	putimage(100,75,kite,XOR_PUT);
	x=100,y=75;

	while(!kbhit())
	{
		setcolor(10);
		putimage(x,y,kite,XOR_PUT);
		setcolor(YELLOW);
		line(x+50,y+55,639,479);
		delay(100);
		putimage(x,y,kite,XOR_PUT);
		setcolor(0);
		line(x+50,y+55,639,479);

		r=rand();

		switch(r%4)
		{
			case 0:x=x+10; break;
			case 1:x=x-10; break;
			case 2:y=y+10; break;
			case 3:y=y-10;break;
		}
		if(x>640) x-=40;
		if(x<40) x+=40;
		if(y>479) y-=40;
		if(y<40) y+=40;
	}

Originally Posted by arunstar008

i am in a little hurry.note that i am a beginner to the C language ...

Okay, well, don't waste any more time then

Do you know how to use scanf? Here's an example:

Code:

#include <stdio.h>

int main(void) {
	char buffer[64];
	printf("Enter your name: ");
	scanf("%63s",buffer);
	printf("Your name is %s!\n",buffer);
	return 0;
}

Here's some basic documentation for scanf:
Keyboard Input: scanf()

See what you can do and feel free to ask more questions.

Edit: removed due to misunderstanding what the OP meant by the height of the kite. I thought he meant dimension, but he meant y axis, on the screen.

You might want to try here for that kind of help:
Rent A Coder: How Software Gets Done -- Home of the worlds' largest number of completed software projects
Someone there may do that for like $10-20.

And if this makes you angry and frustrated, I would just give up programming right now. Adak did a great job of trying to show you something...oh well.

<aside> Is there a lot of homework due tomorrow or something? This is like the third person to just post a demand for homework err help this morning....

OOOOOHHHH! I mis-understood what you posted.

You don't have to change the size of the kite, you just have to change the display (y value), height of the kite in the screen, (and of course, the string too).

That's *much* easier. It's been awhile since i coded in Turbo C graphics, but I can whip something up for you.

Edit: Change a kite flying program for homework?

Really? I never got neat homework like that!!

This is it:

Code:

/* press Esc key to quit */
#include<stdio.h>
#include<graphics.h>
#include<alloc.h>

#define UP 0x48
#define DOWN 0x50
#define ESC 27


int main(void) {
  void *kite;
  int ch, s,x,y,gd=DETECT,gm,r, offy;
  initgraph(&gd,&gm,"c:\tc");
  setcolor(10);
  moveto(100,100);
  lineto(125,75);
  lineto(150,100);
  lineto(120,130);
  lineto(130,130);
  lineto(125,125);
  lineto(100,100);  //this completes the outline design of kite
  setfillstyle(SOLID_FILL,BLUE);
  floodfill(125,100,10);
  floodfill(125,127,10);
  arc(125,120,40,140,31);
  line(125,125,125,75);
  line(125,110,150,130);
  line(125,94,150,130);
 
  s=imagesize(100,75,150,130);
  kite = malloc(s);
  
  getimage(100,75,150,130,kite);
  putimage(100,75,kite,XOR_PUT);
  x=100,y=75;
  offy = 10;
  while(1) {
    setcolor(10);
    putimage(x,y,kite,XOR_PUT);
    setcolor(YELLOW);
    line(x+50,y+55,639,479);
    delay(100);
    putimage(x,y,kite,XOR_PUT);
    setcolor(0);
    line(x+50,y+55,639,479);

    r=rand();
  
    switch(r%4) {
      case 0:x=x+10; break;
      case 1:x=x-10; break;
      case 2:y=y+10; break;
      case 3:y=y-10;break;
    }
    
    if(kbhit()) {
      offy=getch();
      if(offy == UP) y -= 30;
      if(offy == DOWN) y+= 30;
      if(offy == ESC) break;
    }

    if(x>640) x-=40;
    if(x<40) x+=40;
    if(y>490) y-=40;
    if(y<40) y+=40;
  }
  closegraph();
  return 0;
}

Enjoy!