?? fs.htm
字號(hào):
<P> /* output a message */
<BR> outtextxy(midx, midy, stylestr);
<P> /* wait for a key */
<BR> getch();
<BR> cleardevice();
<BR> }
<P> /* clean up */
<BR> closegraph();
<BR> return 0;
<BR>}
<BR>
<BR>
<BR>
<P>函數(shù)名: setmem
<BR>功 能: 存值到存儲(chǔ)區(qū)
<BR>用 法: void setmem(void *addr, int len, char value);
<BR>程序例:
<P>#include <stdio.h>
<BR>#include <alloc.h>
<BR>#include <mem.h>
<P>int main(void)
<BR>{
<BR> char *dest;
<P> dest = calloc(21, sizeof(char));
<BR> setmem(dest, 20, 'c');
<BR> printf("%s\n", dest);
<P> return 0;
<BR>}
<BR>
<BR>
<BR>
<P>函數(shù)名: setmode
<BR>功 能: 設(shè)置打開文件方式
<BR>用 法: int setmode(int handle, unsigned mode);
<BR>程序例:
<P>#include <stdio.h>
<BR>#include <fcntl.h>
<BR>#include <io.h>
<P>int main(void)
<BR>{
<BR> int result;
<P> result = setmode(fileno(stdprn), O_TEXT);
<BR> if (result == -1)
<BR> perror("Mode not available\n");
<BR> else
<BR> printf("Mode successfully switched\n");
<BR> return 0;
<BR>}
<BR>
<BR>
<BR>
<P>函數(shù)名: setpalette
<BR>功 能: 改變調(diào)色板的顏色
<BR>用 法: void far setpalette(int index, int actural_color);
<BR>程序例:
<P>#include <graphics.h>
<BR>#include <stdlib.h>
<BR>#include <stdio.h>
<BR>#include <conio.h>
<P>int main(void)
<BR>{
<BR> /* request auto detection */
<BR> int gdriver = DETECT, gmode, errorcode;
<BR> int color, maxcolor, ht;
<BR> int y = 10;
<BR> char msg[80];
<P> /* initialize graphics and local variables */
<BR> initgraph(&gdriver, &gmode, "");
<P> /* read result of initialization */
<BR> errorcode = graphresult();
<BR> if (errorcode != grOk) /* an error occurred */
<BR> {
<BR> printf("Graphics error: %s\n", grapherrormsg(errorcode));
<BR> printf("Press any key to halt:");
<BR> getch();
<BR> exit(1); /* terminate with an error
code */
<BR> }
<P> maxcolor = getmaxcolor();
<BR> ht = 2 * textheight("W");
<P> /* display the default colors */
<BR> for (color=1; color<=maxcolor; color++)
<BR> {
<BR> setcolor(color);
<BR> sprintf(msg, "Color: %d", color);
<BR> outtextxy(1, y, msg);
<BR> y += ht;
<BR> }
<P> /* wait for a key */
<BR> getch();
<P> /* black out the colors one by one */
<BR> for (color=1; color<=maxcolor; color++)
<BR> {
<BR> setpalette(color, BLACK);
<BR> getch();
<BR> }
<P> /* clean up */
<BR> closegraph();
<BR> return 0;
<BR>}
<BR>
<BR>
<P>函數(shù)名: setrgbpalette
<BR>功 能: 定義IBM8514圖形卡的顏色
<BR>用 法: void far setrgbpalette(int colornum, int red, int green,
int blue);
<BR>程序例:
<P>#include <graphics.h>
<BR>#include <stdlib.h>
<BR>#include <stdio.h>
<BR>#include <conio.h>
<P>int main(void)
<BR>{
<BR> /* select a driver and mode that supports the use */
<BR> /* of the setrgbpalette function.
*/
<BR> int gdriver = VGA, gmode = VGAHI, errorcode;
<BR> struct palettetype pal;
<BR> int i, ht, y, xmax;
<P> /* initialize graphics and local variables */
<BR> initgraph(&gdriver, &gmode, "");
<P> /* read result of initialization */
<BR> errorcode = graphresult();
<BR> if (errorcode != grOk) /* an error occurred */
<BR> {
<BR> printf("Graphics error: %s\n", grapherrormsg(errorcode));
<BR> printf("Press any key to halt:");
<BR> getch();
<BR> exit(1); /* terminate with an error
code */
<BR> }
<P> /* grab a copy of the palette */
<BR> getpalette(&pal);
<P> /* create gray scale */
<BR> for (i=0; i<pal.size; i++)
<BR> setrgbpalette(pal.colors[i], i*4, i*4,
i*4);
<P> /* display the gray scale */
<BR> ht = getmaxy() / 16;
<BR> xmax = getmaxx();
<BR> y = 0;
<BR> for (i=0; i<pal.size; i++)
<BR> {
<BR> setfillstyle(SOLID_FILL, i);
<BR> bar(0, y, xmax, y+ht);
<BR> y += ht;
<BR> }
<P> /* clean up */
<BR> getch();
<BR> closegraph();
<BR> return 0;
<BR>}
<BR>
<BR>
<BR>
<P>函數(shù)名: settextjustify
<BR>功 能: 為圖形函數(shù)設(shè)置文本的對(duì)齊方式
<BR>用 法: void far settextjustify(int horiz, int vert);
<BR>程序例:
<P>#include <graphics.h>
<BR>#include <stdlib.h>
<BR>#include <stdio.h>
<BR>#include <conio.h>
<P>/* function prototype */
<BR>void xat(int x, int y);
<P>/* horizontal text justification settings */
<BR>char *hjust[] = { "LEFT_TEXT",
<BR>
"CENTER_TEXT",
<BR>
"RIGHT_TEXT"
<BR>
};
<P>/* vertical text justification settings */
<BR>char *vjust[] = { "LEFT_TEXT",
<BR> "CENTER_TEXT",
<BR> "RIGHT_TEXT"
<BR>
};
<P>int main(void)
<BR>{
<BR> /* request auto detection */
<BR> int gdriver = DETECT, gmode, errorcode;
<BR> int midx, midy, hj, vj;
<BR> char msg[80];
<P> /* initialize graphics and local variables */
<BR> initgraph(&gdriver, &gmode, "");
<P> /* read result of initialization */
<BR> errorcode = graphresult();
<BR> if (errorcode != grOk) /* an error occurred */
<BR> {
<BR> printf("Graphics error: %s\n", grapherrormsg(errorcode));
<BR> printf("Press any key to halt:");
<BR> getch();
<BR> exit(1); /* terminate with an error
code */
<BR> }
<P> midx = getmaxx() / 2;
<BR> midy = getmaxy() / 2;
<P> /* loop through text justifications */
<BR> for (hj=LEFT_TEXT; hj<=RIGHT_TEXT; hj++)
<BR> for (vj=LEFT_TEXT; vj<=RIGHT_TEXT;
vj++)
<BR> {
<BR> cleardevice();
<BR> /* set the text justification
*/
<BR> settextjustify(hj,
vj);
<P> /* create a message
string */
<BR> sprintf(msg, "%s
%s", hjust[hj], vjust[vj]);
<P> /* create cross hairs on the screen */
<BR> xat(midx, midy);
<P> /* output the message
*/
<BR> outtextxy(midx, midy,
msg);
<BR> getch();
<BR> }
<P> /* clean up */
<BR> closegraph();
<BR> return 0;
<BR>}
<P>/* draw an "x" at (x, y) */
<BR>void xat(int x, int y)
<BR>{
<BR> line(x-4, y, x+4, y);
<BR> line(x, y-4, x, y+4);
<BR>}
<BR>
<BR>
<P>函數(shù)名: settextstyle
<BR>功 能: 為圖形輸出設(shè)置當(dāng)前的文本屬性
<BR>用 法: void far settextstyle (int font, int direction, char size);
<BR>程序例:
<P>#include <graphics.h>
<BR>#include <stdlib.h>
<BR>#include <stdio.h>
<BR>#include <conio.h>
<P>/* the names of the text styles supported */
<BR>char *fname[] = { "DEFAULT font",
<BR>
"TRIPLEX font",
<BR>
"SMALL font",
<BR>
"SANS SERIF font",
<BR>
"GOTHIC font"
<BR>
};
<P>int main(void)
<BR>{
<BR> /* request auto detection */
<BR> int gdriver = DETECT, gmode, errorcode;
<BR> int style, midx, midy;
<BR> int size = 1;
<P> /* initialize graphics and local variables */
<BR> initgraph(&gdriver, &gmode, "");
<P> /* read result of initialization */
<BR> errorcode = graphresult();
<BR> if (errorcode != grOk) /* an error occurred */
<BR> {
<BR> printf("Graphics error: %s\n", grapherrormsg(errorcode));
<BR> printf("Press any key to halt:");
<BR> getch();
<BR> exit(1); /* terminate with an error
code */
<BR> }
<P> midx = getmaxx() / 2;
<BR> midy = getmaxy() / 2;
<P> settextjustify(CENTER_TEXT, CENTER_TEXT);
<P> /* loop through the available text styles */
<BR> for (style=DEFAULT_FONT; style<=GOTHIC_FONT; style++)
<BR> {
<BR> cleardevice();
<BR> if (style == TRIPLEX_FONT)
<BR> size = 4;
<P> /* select the text style */
<BR> settextstyle(style, HORIZ_DIR, size);
<P> /* output a message */
<BR> outtextxy(midx, midy, fname[style]);
<BR> getch();
<BR> }
<P> /* clean up */
<BR> closegraph();
<BR> return 0;
<BR>}
<BR>
<BR>
<P>函數(shù)名: settextstyle
<BR>功 能: 為圖形輸出設(shè)置當(dāng)前的文本屬性
<BR>用 法: void far settextstyle (int font, int direction, char size);
<BR>程序例:
<P>#include <graphics.h>
<BR>#include <stdlib.h>
<BR>#include <stdio.h>
<BR>#include <conio.h>
<P>/* the names of the text styles supported */
<BR>char *fname[] = { "DEFAULT font",
<BR>
"TRIPLEX font",
<BR>
"SMALL font",
<BR>
"SANS SERIF font",
<BR>
"GOTHIC font"
<BR>
};
<P>int main(void)
<BR>{
<BR> /* request auto detection */
<BR> int gdriver = DETECT, gmode, errorcode;
<BR> int style, midx, midy;
<BR> int size = 1;
<P> /* initialize graphics and local variables */
<BR> initgraph(&gdriver, &gmode, "");
<P> /* read result of initialization */
<BR> errorcode = graphresult();
<BR> if (errorcode != grOk) /* an error occurred */
<BR> {
<BR> printf("Graphics error: %s\n", grapherrormsg(errorcode));
<BR> printf("Press any key to halt:");
<BR> getch();
<BR> exit(1); /* terminate with an error
code */
<BR> }
<P> midx = getmaxx() / 2;
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