C语言的函数!

内财数模协会 · 发表于 2004-5-8 17:47:04

<

>函数名: getmodename
功能: 返回含有指定图形模式名的字符串指针
用法: char *far getmodename(int mode_name);
程序例: <

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

>int main(void)
{
/* request autodetection */
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();
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 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 17:47:19

<

>函数名: getmoderange
功能: 取给定图形驱动程序的模式范围
用法: void far getmoderange(int graphdriver, int far *lomode,
int far *himode);
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;
int low, high;
char mrange[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 the mode range for this driver */
getmoderange(gdriver, &low, &high); /* convert mode range info. into strings */
sprintf(mrange, "This driver supports modes %d..%d", low, high); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, mrange); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:47:33

<

>函数名: getpalette
功能: 返回有关当前调色板的信息
用法: void far getpalette(struct palettetype far *palette);
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;
struct palettetype pal;
char psize[80], pval[20];
int i, ht;
int y = 10; /* 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);
} /* grab a copy of the palette */
getpalette(&pal); /* convert palette info. into strings */
sprintf(psize, "The palette has %d \
 modifiable entries.", pal.size); /* display the information */
outtextxy(0, y, psize);
if (pal.size != 0)
{
 ht = textheight("W");
 y += 2*ht;
 outtextxy(0, y, "Here are the current \
 values:");
 y += 2*ht;
 for (i=0; i<pal.size; i++, y+=ht)
 {
 sprintf(pval,
"palette[%02d]: 0x%02X", i,
pal.colors);
 outtextxy(0, y, pval);
 }
} /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:47:42

<

>函数名: getpass
功能: 读一个口令
用法: char *getpass(char *prompt);
程序例: <

>#include <conio.h> <

>int main(void)
{
char *password; password = getpass("Input a password:");
cprintf("The password is: %s\r\n",
password);
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:47:53

<

>函数名: getpixel
功能: 取得指定像素的颜色
用法: int far getpixel(int x, int y);
程序例: <

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

>#define PIXEL_COUNT 1000
#define DELAY_TIME 100 /* in milliseconds */ int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int i, x, y, color, maxx, maxy,
 maxcolor, seed; /* 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);
} maxx = getmaxx() + 1;
maxy = getmaxy() + 1;
maxcolor = getmaxcolor() + 1; while (!kbhit())
{
/* seed the random number generator */
 seed = random(32767);
 srand(seed);
 for (i=0; i<PIXEL_COUNT; i++)
 {
 x = random(maxx);
 y = random(maxy);
 color = random(maxcolor);
 putpixel(x, y, color);
 } delay(DELAY_TIME);
 srand(seed);
 for (i=0; i<PIXEL_COUNT; i++)
 {
 x = random(maxx);
 y = random(maxy);
 color = random(maxcolor);
 if (color == getpixel匇? ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;h;(;);;; ;e;t;p;s;p;(;););;; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;e;s;e;t; ;t;o; ;s;e;g;m;e;n;t; ;o;f; ;t;h;e; ;P;S;P; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;i;n;e; ;i;s; ;l;o;c;a;t;e;d; ;a;t; ;o;f;f;s;e;t; ;0;x;8;1; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;t; ;o;f; ;P;S;P; ; ; ; ; ; ; ; ;

内财数模协会 · 发表于 2004-5-8 17:48:04

<

>函数名: gets
功能: 从流中取一字符串
用法: char *gets(char *string);
程序例: <

>#include <stdio.h> <

>int main(void)
{
char string[80]; printf("Input a string:");
gets(string);
printf("The string input was: %s\n",
string);
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:48:14

<

>函数名: gettext
功能: 将文本方式屏幕上的文本拷贝到存储区
用法: int gettext(int left, int top, int right, int bottom, void *destin);
程序例: <

>#include <conio.h> <

>char buffer[4096]; int main(void)
{
int i;
clrscr();
for (i = 0; i <= 20; i++)
cprintf("Line #%d\r\n", i);
gettext(1, 1, 80, 25, buffer);
gotoxy(1, 25);
cprintf("Press any key to clear screen...");
getch();
clrscr();
gotoxy(1, 25);
cprintf("Press any key to restore screen...");
getch();
puttext(1, 1, 80, 25, buffer);
gotoxy(1, 25);
cprintf("Press any key to quit...");
getch();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:48:23

<

>函数名: gettextinfo
功能: 取得文本模式的显示信息
用法: void gettextinfo(struct text_info *inforec);
程序例: <

>#include <conio.h> <

>int main(void)
{
struct text_info ti;
gettextinfo(&ti);
cprintf("window left %2d\r\n",ti.winleft);
cprintf("window top %2d\r\n",ti.wintop);
cprintf("window right %2d\r\n",ti.winright);
cprintf("window bottom %2d\r\n",ti.winbottom);
cprintf("attribute %2d\r\n",ti.attribute);
cprintf("normal attribute %2d\r\n",ti.normattr);
cprintf("current mode %2d\r\n",ti.currmode);
cprintf("screen height %2d\r\n",ti.screenheight);
cprintf("screen width %2d\r\n",ti.screenwidth);
cprintf("current x %2d\r\n",ti.curx);
cprintf("current y %2d\r\n",ti.cury);
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:48:38

<

>函数名: gettextsettings
功能: 返回有关当前图形文本字体的信息
用法: void far gettextsettings(struct textsettingstype far *textinfo);
程序例: <

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

>/* the names of the fonts supported */
char *font[] = { "DEFAULT_FONT",
 "TRIPLEX_FONT",
 "SMALL_FONT",
 "SANS_SERIF_FONT",
 "GOTHIC_FONT"
 }; /* the names of the text directions supported */
char *dir[] = { "HORIZ_DIR", "VERT_DIR" }; /* horizontal text justifications supported */
char *hjust[] = { "LEFT_TEXT", "CENTER_TEXT", "RIGHT_TEXT" }; /* vertical text justifications supported */
char *vjust[] = { "BOTTOM_TEXT", "CENTER_TEXT", "TOP_TEXT" }; int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
struct textsettingstype textinfo;
int midx, midy, ht;
char fontstr[80], dirstr[80], sizestr[80];
char hjuststr[80], vjuststr[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 text settings */
gettextsettings(&textinfo); /* convert text information into strings */
sprintf(fontstr, "%s is the text style.", font[textinfo.font]);
sprintf(dirstr, "%s is the text direction.", dir[textinfo.direction]);
sprintf(sizestr, "%d is the text size.", textinfo.charsize);
sprintf(hjuststr, "%s is the horizontal justification.",
 hjust[textinfo.horiz]);
sprintf(vjuststr, "%s is the vertical justification.",
 vjust[textinfo.vert]); /* display the information */
ht = textheight("W");
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, fontstr);
outtextxy(midx, midy+2*ht, dirstr);
outtextxy(midx, midy+4*ht, sizestr);
outtextxy(midx, midy+6*ht, hjuststr);
outtextxy(midx, midy+8*ht, vjuststr); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-8 17:48:47

<

>函数名: gettime
功能: 取得系统时间
用法: void gettime(struct time *timep);
程序例: <

>#include <stdio.h>
#include <dos.h> <

>int main(void)
{
struct time t; gettime(&t);
printf("The current time is: %2d:%02d:%02d.%02d\n",
 t.ti_hour, t.ti_min, t.ti_sec, t.ti_hund);
return 0;
}

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