linerel

Draws a line a relative distance from the current position (CP).

Defined in header <graphics.h>

Syntax

#include <graphics.h>
void  far linerel(int dx, int dy);

Portability

Remarks

linerel draws a line from the CP to a point that is a relative distance {dx,dy) from the CP. The CP is advanced by {dx,dy).

Return value

None.

See also

• getlinesettings
• line
• lineto
• setcolor
• setlinestyle
• setwritemode

Example

#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
int main(void)

   /* request autodetection */
   int gdriver = DETECT, gmode, errorcode;
char msg[80] ;
/* initialize graphics and  local variables */
initgraph(&gdriver, &gmode,  "");

/* read result of initialization  */
errorcode = graphresult ();
if  (errorcode != grOk) {
   printf( "Graphics error: %s\n", grapherrormsg(errorcode));
   printf("Press any key to halt:");
   getchO;
   exit(l);
}
/* move the CP to location  (20,30) */
moveto (20,30),•

/* create and output a message at  (20,30) */
sprintf(msg, "  (%d, %d)", getx(), getyO);
outtextxy (20,30, msg);
/* draw line to a point a relative  distance away from current CP */
linerel (100, 100);

/* create and output a message at CP  */
sprintf(msg, "  (%d, %d)", getx(), getyO);
outtext (msg);
/* clean up */
getchO ;
closegraphO ;
return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

• Microsoft C runtime (search)

These are search links, not yet checked by hand.

Stable link: /3.1/graphics.h/linerel/ · short form /3.1/linerel/