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C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(11)

C³ÌÐòÊÇÓÉÒ»×é»òÊDZäÁ¿»òÊǺ¯ÊýµÄÍⲿ¶ÔÏó×é³ÉµÄ¡£ º¯ÊýÊÇÒ»¸ö×ÔÎÒ°üº¬µÄÍê³ÉÒ»¶¨Ïà¹Ø¹¦ÄܵÄÖ´ÐдúÂë¶Î¡£ÏÂÃæÐ¡±àºÍ´ó¼Ò·ÖÏíÏÂCÓïÑÔÖеĺ¯Êý¡£
 
1. kbhitº¯Êý
 
kbhitº¯ÊýÊǼì²éµ±Ç°°´Ïµļü£¬ÆäÓ÷¨Îª£ºint kbhit(void);³ÌÐòÀý×ÓÈçÏ£º
#include <conio.h>
int main(void)
{
   cprintf("Press any key to continue:");
   while (!kbhit()) /* do nothing */ ;
   cprintf("\r\nA key was pressed...\r\n");
   return 0;
}
2. keepº¯Êý
 
keepº¯ÊýÊÇÍ˳ö²¢¼ÌÐø×¤Áô£¬ÆäÓ÷¨Îª£ºvoid keep(int status, int size);³ÌÐòÀý×ÓÈçÏ£º
#include <dos.h>
#define INTR 0x1C
#define ATTR 0x7900
extern unsigned _heaplen = 1024;
extern unsigned _stklen  = 512;
void interrupt ( *oldhandler)(void);
void interrupt handler(void)
{
   unsigned int (far *screen)[80];
   static int count;
   screen = MK_FP(0xB800,0);
   count++;
   count %= 10;
   screen[0][79] = count + '0' + ATTR;
   oldhandler();
}
int main(void)
{
oldhandler = getvect(INTR);
setvect(INTR, handler);
keep(0, (_SS + (_SP/16) - _psp));
return 0;
}
3. lfindº¯Êý
Lfindº¯ÊýÊÇÖ´ÐÐÏßÐÔËÑË÷£¬ÆäÓ÷¨Îª£ºvoid *lfind(void *key, void *base, int *nelem, int width, int (*fcmp)()); ³ÌÐòÀý×ÓÈçÏ£º
#include <stdio.h>
#include <stdlib.h>
int compare(int *x, int *y)
{
   return( *x - *y );
}
int main(void)
{
   int array[5] = {35, 87, 46, 99, 12};
   size_t nelem = 5;
   int key;
   int *result;
   key = 99;
   result = lfind(&key, array, &nelem,
        sizeof(int), (int(*)(const void *,const void *))compare);
   if (result)
      printf("Number %d found\n",key);
   else
      printf("Number %d not found\n",key);
   return 0;
}


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extern "C"Ïê½â

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#ifdef __cplusplus 
extern "C" { 
#endif 
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#ifdef __cplusplus 

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C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(10)

C³ÌÐòÊÇÓÉÒ»×é»òÊDZäÁ¿»òÊǺ¯ÊýµÄÍⲿ¶ÔÏó×é³ÉµÄ¡£ º¯ÊýÊÇÒ»¸ö×ÔÎÒ°üº¬µÄÍê³ÉÒ»¶¨Ïà¹Ø¹¦ÄܵÄÖ´ÐдúÂë¶Î¡£ÏÂÃæÐ¡±àºÍ´ó¼Ò·ÖÏíÏÂCÓïÑÔÖеĺ¯Êý¡£
 
1. initgraphº¯Êý
initgraphº¯ÊýÊdzõʼ»¯Í¼ÐÎϵͳ£¬ÆäÓ÷¨Îª£ºvoid far initgraph(int far *graphdriver, int far *graphmode,char far *pathtodriver); ³ÌÐòÀý×ÓÈçÏ£ ......
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