函数名: setpalette

功 能: 改变调色板的颜色

用 法: void far setpalette(int index, int actural_color);

程序例:

#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

int main(void)

{

/* request auto detection */

int gdriver = DETECT, gmode, errorcode;

int color, maxcolor, ht;

int y = 10;

char msg[80];

/* initialize graphics and local variables */

initgraph(&gdriver, &gmode, "");

/* read result of initialization */

errorcode = graphresult();

if (errorcode != grOk) /* an error occurred */

{

printf("Graphics error: %s\", grapherrormsg(errorcode));

printf("Press any key to halt:");

getch();

exit(1); /* terminate with an error code */

}

maxcolor = getmaxcolor();

ht = 2 * textheight("W");

/* display the default colors */

for (color=1; color<=maxcolor; color++)

{

setcolor(color);

sprintf(msg, "Color: %d", color);

outtextxy(1, y, msg);

y += ht;

}

/* wait for a key */

getch();

/* black out the colors one by one */

for (color=1; color<=maxcolor; color++)

{

setpalette(color, BLACK);

getch();

}

/* clean up */

closegraph();

return 0;

}