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C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(13)

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1.       mallocº¯Êý
mallocº¯ÊýµÄ¹¦ÄÜÊÇÄÚ´æ·ÖÅ亯Êý£¬ÆäÓ÷¨Îª£ºvoid *malloc(unsigned size);³ÌÐòʵÀýÈçÏ£º
#include <stdio.h>
#include <string.h>
#include <alloc.h>
#include <process.h>
int main(void)
{
   char *str;
      if ((str = malloc(10)) == NULL)
   {
      printf("Not enough memory to allocate buffer\n");
      exit(1);  /* terminate program if out of memory */
   }
    strcpy(str, "Hello");
    printf("String is %s\n", str);
    free(str);
    return 0;
}
 
2.      memchrº¯Êý
memchrº¯ÊýµÄ¹¦ÄÜÊÇÔÚÊý×éµÄǰn¸ö×Ö½ÚÖÐËÑË÷×Ö·û£¬ÆäÓ÷¨Îª£ºvoid *memchr(void *s, char ch, unsigned n);  ³ÌÐòʵÀý´úÂëÈçÏ£º
#include <string.h>
#include <stdio.h>
int main(void)
{
   char str[17];
   char *ptr;
   strcpy(str, "This is a string");
   ptr = memchr(str, 'r', strlen(str));
   if (ptr)
      printf("The character 'r' is at position: %d\n", ptr - str);
   else
      printf("The character was not found\n");
   return 0;
}
3.      memicmpº¯Êý
memicmpº¯ÊýµÄ¹¦ÄÜÊDZȽÏÁ½¸ö´®s1ºÍs2µÄǰn¸ö×Ö½Ú, ºöÂÔ´óСд£¬ÆäÓ÷¨Îª£ºint memicmp(void *s1, void *s2, unsigned n);³ÌÐòʵÀý´úÂëÈçÏ£º
#include <stdio.h>
#include <string.h>
int main(void)
{
   char *buf1 = "ABCDE123";
   char *buf2 = "abcde456";
   int stat;
   stat = memicmp(buf1, buf2, 5);
   printf("The strings to position 5 are ");
   if (stat)
   printf("not ");
 &


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C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(9)

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1.     harderrº¯Êý
harderrº¯ÊýµÄ¹¦ÄÜÊǽ¨Á¢Ò»¸öÓ²¼þ´íÎó´¦Àí³ÌÐò£¬ÆäÓ÷¨ÊÇ£ºvoid harderr(int (*fptr)());³ÌÐòÀý×ÓÈçÏ£º
#include <stdio.h>
......

C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(10)

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1. initgraphº¯Êý
initgraphº¯ÊýÊdzõʼ»¯Í¼ÐÎϵͳ£¬ÆäÓ÷¨Îª£ºvoid far initgraph(int far *graphdriver, int far *graphmode,char far *pathtodriver); ³ÌÐòÀý×ÓÈçÏ£ ......

CºÍC++»ìºÏ±à³Ì(__cplusplusʹÓÃ)


µÚÒ»ÖÖÀí½â
±ÈÈç˵ÄãÓÃC++¿ª·¢ÁËÒ»¸öDLL¿â£¬ÎªÁËÄܹ»ÈÃCÓïÑÔÒ²Äܹ»µ÷ÓÃÄãµÄDLLÊä³ö(Export)µÄº¯Êý£¬ÄãÐèÒªÓÃextern "C"À´Ç¿ÖƱàÒëÆ÷²»ÒªÐÞ¸ÄÄãµÄ
º¯ÊýÃû¡£
ͨ³££¬ÔÚCÓïÑÔµÄÍ·ÎļþÖо­³£¿ÉÒÔ¿´µ½ÀàËÆÏÂÃæÕâÖÖÐÎʽµÄ´úÂ룺
#ifdef __cplusplus
extern "C" {
#endif
/**** some declaration or so *****/
#ifde ......

C×Ö·û´®²Ù×÷º¯ÊýÔ´Âë

 
#ifndef _PPC_BOOT_STRING_H_
#define _PPC_BOOT_STRING_H_
#include <stddef.h>
extern char *strcpy(char *dest, const char *src);
extern char *strncpy(char *dest, const char *src, size_t n);
extern char *strcat(char *dest, const char *src);
extern int strcmp(const char *s1, const cha ......

ÓÃCдµÄ¶ÁÈ¡´úÂëÐÐÊý¡£

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ÏÖÔڵĴúÂëÈçÏ£¬¿ÉÄÜ»¹Óв»ÍêÉÆµÄµØ·½£¬ÒÔºóÔٸĽø£º
#include <stdio.h>
#define CHARCOUNT 255
#define CON 6 /*µ¥ÐÐ×¢ÊÍ×îÉÙµÄʱºò*/
int realLength = 0;
/*
* function name: strCount
* function : count ......
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