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C语言函数库,包含所有的C语言函数

功 能: 建立一个目录 
用 法: int mkdir(char *pathname); 
程序例: </PRE>
<PRE>#include 
#include 
#include 
#include </PRE>
<PRE>int main(void) 
{ 
int status; </PRE>
<PRE>clrscr(); 
status = mkdir(&quot;asdfjklm&quot;); 
(!status) ? (printf(&quot;Directory created\n&quot;)) : 
(printf(&quot;Unable to create directory\n&quot;)); </PRE>
<PRE>getch(); 
system(&quot;dir&quot;); 
getch(); </PRE>
<PRE>status = rmdir(&quot;asdfjklm&quot;); 
(!status) ? (printf(&quot;Directory deleted\n&quot;)) : 
(perror(&quot;Unable to delete directory&quot;)); </PRE>
<PRE>return 0; 
} 


</PRE>
<PRE>函数名: <font size="5" color="#FF0000">mktemp </font>
功 能: 建立唯一的文件名 
用 法: char *mktemp(char *template); 
程序例: </PRE>
<PRE>#include 
#include </PRE>
<PRE>int main(void) 
{ 
/* fname defines the template for the 
temporary file. */ </PRE>
<PRE>char *fname = &quot;TXXXXXX&quot;, *ptr; </PRE>
<PRE>ptr = mktemp(fname); 
printf(&quot;%s\n&quot;,ptr); 
return 0; 
} 

</PRE>
<PRE>函数名:<font size="5" color="#FF0000"> MK_FP </font>
功 能: 设置一个远指针 
用 法: void far *MK_FP(unsigned seg, unsigned off); 
程序例: </PRE>
<PRE>#include 
#include </PRE>
<PRE>int main(void) 
{ 
int gd, gm, i; 
unsigned int far *screen; </PRE>
<PRE>detectgraph(&amp;gd, &amp;gm); 
if (gd == HERCMONO) 
screen = MK_FP(0xB000, 0); 
else 
screen = MK_FP(0xB800, 0); 
for (i=0; i&lt;26; i++) 
screen[i] = 0x0700 + ('a' + i); 
return 0; 
} 

</PRE>
<PRE>函数名: <font size="5" color="#FF0000">modf </font>
功 能: 把数分为指数和尾数 
用 法: double modf(double value, double *iptr); 
程序例: </PRE>
<PRE>#include 
#include </PRE>
<PRE>int main(void) 
{ 
double fraction, integer; 
double number = 100000.567; </PRE>
<PRE>fraction = modf(number, &amp;integer); 
printf(&quot;The whole and fractional parts of %lf are %lf and %lf\n&quot;, 
number, integer, fraction); 
return 0; 
} 

</PRE>
<PRE>函数名:<font size="5" color="#FF0000"> movedata </font>
功 能: 拷贝字节 
用 法: void movedata(int segsrc, int offsrc, int segdest, 
int offdest, unsigned numbytes); 
程序例: </PRE>
<PRE>#include </PRE>
<PRE>#define MONO_BASE 0xB000 </PRE>
<PRE>/* saves the contents of the monochrome screen in buffer */ 
void save_mono_screen(char near *buffer) 
{ 
movedata(MONO_BASE, 0, _DS, (unsigned)buffer, 80*25*2); 
} </PRE>
<PRE>int main(void) 
{ 
char buf[80*25*2]; 
save_mono_screen(buf); 
} 

</PRE>
<PRE>函数名:<font size="5" color="#FF0000"> moverel </font>
功 能: 将当前位置(CP)移动一相对距离 
用 法: void far moverel(int dx, int dy); 
程序例: </PRE>
<PRE>#include 
#include 
#include 
#include </PRE>
<PRE>int main(void) 
{ 
/* request auto detection */ 
int gdriver = DETECT, gmode, errorcode; 
char msg[80]; </PRE>
<PRE>/* initialize graphics and local variables */ 
initgraph(&amp;gdriver, &amp;gmode, &quot;&quot;); </PRE>
<PRE>/* read result of initialization */ 
errorcode = graphresult(); 
if (errorcode != grOk) /* an error occurred */ 
{ 
printf(&quot;Graphics error: %s\n&quot;, grapherrormsg(errorcode)); 
printf(&quot;Press any key to halt:&quot;); 
getch(); 
exit(1); /* terminate with an error code */ 
} </PRE>
<PRE>/* move the C.P. to location (20, 30) */ 
moveto(20, 30); </PRE>
<PRE>/* plot a pixel at the C.P. */ 
putpixel(getx(), gety(), getmaxcolor()); </PRE>
<PRE>/* create and output a message at (20, 30) */ 
sprintf(msg, &quot; (%d, %d)&quot;, getx(), gety()); 
outtextxy(20, 30, msg); </PRE>
<PRE>/* move to a point a relative distance */ 
/* away from the current value of C.P. */ 
moverel(100, 100); </PRE>
<PRE>/* plot a pixel at the C.P. */ 
putpixel(getx(), gety(), getmaxcolor()); </PRE>
<PRE>/* create and output a message at C.P. */ 
sprintf(msg, &quot; (%d, %d)&quot;, getx(), gety()); 
outtext(msg); </PRE>
<PRE>/* clean up */ 
getch(); 
closegraph(); 
return 0; 
} 

</PRE>
<PRE>函数名: <font size="5" color="#FF0000">movetext </font>
功 能: 将屏幕文本从一个矩形区域拷贝到另一个矩形区域 
用 法: int movetext(int left, int top, int right, int bottom, 
int newleft, int newtop); 
程序例: 
#include 
#include </PRE>
<PRE>int main(void) 
{ 
char *str = &quot;This is a test string&quot;; </PRE>
<PRE>clrscr(); 
cputs(str); 
getch(); </PRE>
<PRE>movetext(1, 1, strlen(str), 2, 10, 10); 
getch(); </PRE>
<PRE>return 0; 
} 

</PRE>
<PRE>函数名: <font size="5" color="#FF0000">moveto </font>
功 能: 将CP移到(x, y) 
用 法: void far moveto(int x, int y); 
程序例: </PRE>
<PRE>#include 
#include 
#include 
#include </PRE>
<PRE>int main(void) 
{ 
/* request auto detection */ 
int gdriver = DETECT, gmode, errorcode; 
char msg[80]; </PRE>
<PRE>/* initialize graphics and local variables */ 
initgraph(&amp;gdriver, &amp;gmode, &quot;&quot;); </PRE>
<PRE>/* read result of initialization */ 
errorcode = graphresult(); 
if (errorcode != grOk) /* an error occurred */ 
{ 
printf(&quot;Graphics error: %s\n&quot;, grapherrormsg(errorcode)); 
printf(&quot;Press any key to halt:&quot;); 
getch(); 
exit(1); /* terminate with an error code */ 
} </PRE>
<PRE>/* move the C.P. to location (20, 30) */ 
moveto(20, 30); </PRE>
<PRE>/* plot a pixel at the C.P. */ 
putpixel(getx(), gety(), getmaxcolor()); </PRE>
<PRE>/* create and output a message at (20, 30) */ 
sprintf(msg, &quot; (%d, %d)&quot;, getx(), gety()); 
outtextxy(20, 30, msg); </PRE>
<PRE>/* move to (100, 100) */ 
moveto(100, 100); </PRE>
<PRE>/* plot a pixel at the C.P. */ 
putpixel(getx(), gety(), getmaxcolor()); </PRE>
<PRE>/* create and output a message at C.P. */ 
sprintf(msg, &quot; (%d, %d)&quot;, getx(), gety()); 
outtext(msg); </PRE>
<PRE>/* clean up */ 
getch(); 
closegraph(); 
return 0; 
} 

</PRE>
<PRE>函数名:<font size="5" color="#FF0000"> movemem </font>
功 能: 移动一块字节 
用 法: void movemem(void *source, void *destin, unsigned len); 
程序例: </PRE>
<PRE>#include 
#include 
#include 
#include </PRE>
<PRE>int main(void) 
{ 
char *source = &quot;Borland International&quot;; 
char *destination; 
int length; </PRE>
<PRE>length = strlen(source); 
destination = malloc(length + 1); 
movmem(source,destination,length); 
printf(&quot;%s\n&quot;,destination); </PRE>
<PRE>return 0; 
} 



</PRE>

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<PRE>资料收集：beck Copyright 2004 张求熙, All Rights Reserved</PRE>
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