C language, using svga256.bgi to achieve 256 color display, how to change the background color? ? ? Anxious! !!

aji036

The setbkcolor () function does not work, the background is always black.

zjwzjw

Fill the entire window with a certain color .......

zjwzjw

have a test:

#include <stdio.h>
#include <conio.h>
#include <graphics.h>

int main ()
{
int gdriver, gmode, i;
gdriver = DETECT;
initgraph (&gdriver,&gmode, ""); / * Graph initialization * /
setbkcolor (2); / * Set the graphics background * /
getch ();
cleardevice ();
getch ();
for (i = 0; i <= 15; i ++)
{
setcolor (i); / * Set different drawing colors * /
circle (320, 240, 20 + i * 10); / * Draw circles with different radii * /
delay (100); / * Delay 100 ms * /
}
for (i = 0; i <= 15; i ++)
{
setbkcolor (i); / * Set different background colors * /
cleardevice ();
circle (320, 240, 20 + i * 10);
delay (100);
}
getch ();
closegraph ();
return 0;
}

zjwzjw

If setbkcolor is valid,
Then check your program ~~

aji036

For 16-color display, this function is valid. Use svga256.bgi to achieve 256-color display. The function is invalid. The return value of getplatette() is 1? ? ? ?

oliver123

This program is too long to be modified.

joyoyj

See the program