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─────Run-Time Library───────────────────────────────────────────────────────
 
/* CGAPAL.C illustrates CGA palettes using function:
 *      _selectpalette                                            (DOS-only)
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <graph.h>
 
long bkcolor[8] = { _BLACK,  _BLUE,     _GREEN,  _CYAN,
                    _RED,    _MAGENTA,  _BROWN,  _WHITE };
char *bkname [] = { "BLACK", "BLUE",    "GREEN", "CYAN",
                    "RED",   "MAGENTA", "BROWN", "WHITE" };
void main()
{
    int i, j, k;
 
    if ( !_setvideomode( _MRES4COLOR ) )
        exit( 1 );
    for( i = 0; i < 4; i++ )                    /* Palette loop          */
    {
        _selectpalette( i );
        for( k = 0; k < 8; k++ )                /* Background color loop */
        {
            _clearscreen( _GCLEARSCREEN );
            _setbkcolor( bkcolor[k] );
            _settextposition( 1, 1 );
            printf( "Background: %s\tPalette: %d", bkname[k], i );
            for( j = 1; j < 4; j++ )            /* Foreground color loop */
            {
                _setcolor( j );
                _ellipse( _GFILLINTERIOR, 100, j * 30, 220, 80 + (j * 30) );
            }
            _getch();
        }
    }
    _setvideomode( _DEFAULTMODE );
}
                                    -♦-