C语言的函数!

内财数模协会 · 发表于 2004-5-8 17:44:59

<

>函数名: getfillsettings
功能: 取得有关当前填充模式和填充颜色的信息
用法: void far getfillsettings(struct fillsettingstype far *fillinfo);
程序例: <

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

>/ the names of the fill styles supported */
char *fname[] = { "EMPTY_FILL",
 "SOLID_FILL",
 "LINE_FILL",
 "LTSLASH_FILL",
 "SLASH_FILL",
 "BKSLASH_FILL",
 "LTBKSLASH_FILL",
 "HATCH_FILL",
 "XHATCH_FILL",
 "INTERLEAVE_FILL",
 "WIDE_DOT_FILL",
 "CLOSE_DOT_FILL",
 "USER_FILL"
 }; int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
struct fillsettingstype fillinfo;
int midx, midy;
char patstr[40], colstr[40]; /* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
 printf("Graphics error: %s\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1); /* terminate with an error code */
} midx = getmaxx() / 2;
midy = getmaxy() / 2; /* get information about current fill pattern and color */
getfillsettings(&fillinfo); /* convert fill information into strings */
sprintf(patstr, "%s is the fill style.", fname[fillinfo.pattern]);
sprintf(colstr, "%d is the fill color.", fillinfo.color); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, patstr);
outtextxy(midx, midy+2*textheight("W"), colstr); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:45:09

<

>函数名: getftime
功能: 取文件日期和时间
用法: int getftime(int handle, struct ftime *ftimep);
程序例: <

>#include <stdio.h>
#include <io.h> <

>int main(void)
{
FILE *stream;
struct ftime ft; if ((stream = fopen("TEST.$$$",
 "wt")) == NULL)
{
 fprintf(stderr,
 "Cannot open output file.\n");
 return 1;
}
getftime(fileno(stream), &ft);
printf("File time: %u:%u:%u\n",
 ft.ft_hour, ft.ft_min,
 ft.ft_tsec * 2);
printf("File date: %u/%u/%u\n",
ft.ft_month, ft.ft_day,
ft.ft_year+1980);
fclose(stream);
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:45:18

<

>函数名: getgraphmode
功能: 返回当前图形模式
用法: int far getgraphmode(void);
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 midx, midy, mode;
char numname[80], modename[80]; /* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
/* an error occurred */
if (errorcode != grOk)
{
 printf("Graphics error: %s\n",
 grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
/* terminate with an error code */
 exit(1);
} midx = getmaxx() / 2;
midy = getmaxy() / 2; /* get mode number and name strings */
mode = getgraphmode();
sprintf(numname,
 "%d is the current mode number.",
 mode);
sprintf(modename,
 "%s is the current graphics mode",
 getmodename(mode)); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, numname);
outtextxy(midx, midy+2*textheight("W"),
 modename); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:45:31

<

>函数名: getftime
功能: 取文件日期和时间
用法: int getftime(int handle, struct ftime *ftimep);
程序例: <

>#include <stdio.h>
#include <io.h> <

>int main(void)
{
FILE *stream;
struct ftime ft; if ((stream = fopen("TEST.$$$",
 "wt")) == NULL)
{
 fprintf(stderr,
 "Cannot open output file.\n");
 return 1;
}
getftime(fileno(stream), &ft);
printf("File time: %u:%u:%u\n",
 ft.ft_hour, ft.ft_min,
 ft.ft_tsec * 2);
printf("File date: %u/%u/%u\n",
ft.ft_month, ft.ft_day,
ft.ft_year+1980);
fclose(stream);
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:45:41

<

>函数名: getgraphmode
功能: 返回当前图形模式
用法: int far getgraphmode(void);
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 midx, midy, mode;
char numname[80], modename[80]; /* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
/* an error occurred */
if (errorcode != grOk)
{
 printf("Graphics error: %s\n",
 grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
/* terminate with an error code */
 exit(1);
} midx = getmaxx() / 2;
midy = getmaxy() / 2; /* get mode number and name strings */
mode = getgraphmode();
sprintf(numname,
 "%d is the current mode number.",
 mode);
sprintf(modename,
 "%s is the current graphics mode",
 getmodename(mode)); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, numname);
outtextxy(midx, midy+2*textheight("W"),
 modename); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:45:58

<

>函数名: getimage
功 能: 将指定区域的一个位图存到主存中
用 法: void far getimage(int left, int top, int right, int bottom,
 void far *bitmap);
程序例: <

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

>void save_screen(void far *buf[4]);
void restore_screen(void far *buf[4]); int maxx, maxy; int main(void)
{
int gdriver=DETECT, gmode, errorcode;
void far *ptr[4]; /* auto-detect the graphics driver and mode */
initgraph(&gdriver, &gmode, "");
errorcode = graphresult(); /* check for any errors */
if (errorcode != grOk)
{
 printf("Graphics error: %s\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1);
}
maxx = getmaxx();
maxy = getmaxy(); /* draw an image on the screen */
rectangle(0, 0, maxx, maxy);
line(0, 0, maxx, maxy);
line(0, maxy, maxx, 0); save_screen(ptr); /* save the current screen */
getch(); /* pause screen */
cleardevice(); /* clear screen */
restore_screen(ptr); /* restore the screen */
getch(); /* pause screen */ closegraph();
return 0;
} void save_screen(void far *buf[4])
{
unsigned size;
int ystart=0, yend, yincr, block; yincr = (maxy+1) / 4;
yend = yincr;
size = imagesize(0, ystart, maxx, yend); /* get byte size of image */ for (block=0; block<=3; block++)
{
 if ((buf[block] = farmalloc(size)) == NULL)
 {
 closegraph();
 printf("Error: not enough heap space in save_screen().\n");
 exit(1);
 } getimage(0, ystart, maxx, yend, buf[block]);
 ystart = yend + 1;
 yend += yincr + 1;
}
} void save_screen(void far *buf[4])
{
unsigned size;
int ystart=0, yend, yincr, block; yincr = (maxy+1) / 4;
yend = yincr;
size = imagesize(0, ystart, maxx, yend); /* get byte size of image */ for (block=0; block<=3; block++)
{
 if ((buf[block] = farmalloc(size)) == NULL)
 {
 closegraph();
 printf("Error: not enough heap space in save_screen().\n");
 exit(1);
 } getimage(0, ystart, maxx, yend, buf[block]);
 ystart = yend + 1;
 yend += yincr + 1;
}
} void restore_screen(void far *buf[4])
{
int ystart=0, yend, yincr, block; yincr = (maxy+1) / 4;
yend = yincr; for (block=0; block<=3; block++)
{
 putimage(0, ystart, buf[block], COPY_PUT);
 farfree(buf[block]);
 ystart = yend + 1;
 yend += yincr + 1;
}
}

内财数模协会 · 发表于 2004-5-8 17:46:11

<

>函数名: getlinesettings
功能: 取当前线型、模式和宽度
用法: void far getlinesettings(struct linesettingstype far *lininfo):
程序例: <

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

>/* the names of the line styles supported */
char *lname[] = { "SOLID_LINE",
 "DOTTED_LINE",
 "CENTER_LINE",
 "DASHED_LINE",
 "USERBIT_LINE"
 }; int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
struct linesettingstype lineinfo;
int midx, midy;
char lstyle[80], lpattern[80], lwidth[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\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1); /* terminate with an error code */
} midx = getmaxx() / 2;
midy = getmaxy() / 2; /* get information about current line settings */
getlinesettings(&lineinfo); /* convert line information into strings */
sprintf(lstyle, "%s is the line style.",
 lname[lineinfo.linestyle]);
sprintf(lpattern, "0x%X is the user-defined line pattern.",
 lineinfo.upattern);
sprintf(lwidth, "%d is the line thickness.",
lineinfo.thickness); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, lstyle);
outtextxy(midx, midy+2*textheight("W"), lpattern);
outtextxy(midx, midy+4*textheight("W"), lwidth); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:46:21

<

>函数名: getmaxcolor
功能: 返回可以传给函数setcolor的最大颜色值
用法: int far getmaxcolor(void);
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 midx, midy;
char colstr[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\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1); /* terminate with an error code */
} midx = getmaxx() / 2;
midy = getmaxy() / 2; /* grab the color info. and convert it to a string */
sprintf(colstr, "This mode supports colors 0..%d", getmaxcolor()); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, colstr); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:46:33

<

>函数名: getmaxx
功能: 返回屏幕的最大x坐标
用法: int far getmaxx(void);
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 midx, midy;
char xrange[80], yrange[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\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1); /* terminate with an error code */
} midx = getmaxx() / 2;
midy = getmaxy() / 2; /* convert max resolution values into strings */
sprintf(xrange, "X values range from 0..%d", getmaxx());
sprintf(yrange, "Y values range from 0..%d", getmaxy()); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, xrange);
outtextxy(midx, midy+textheight("W"), yrange); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:46:44

<

>函数名: getmaxy
功能: 返回屏幕的最大y坐标
用法: int far getmaxy(void);
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 midx, midy;
char xrange[80], yrange[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\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1); /* terminate with an error code */
} midx = getmaxx() / 2;
midy = getmaxy() / 2; /* convert max resolution values into strings */
sprintf(xrange, "X values range from 0..%d", getmaxx());
sprintf(yrange, "Y values range from 0..%d", getmaxy()); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, xrange);
outtextxy(midx, midy+textheight("W"), yrange); /* clean up */
getch();
closegraph();
return 0;
}

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