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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×éµÄÇ°n¸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´®s1ºÍs2µÄÇ°n¸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(11)

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1. kbhitº¯Êý
 
kbhitº¯ÊýÊǼì²éµ±Ç°°´Ïµļü£¬ÆäÓ÷¨Îª£ºint kbhit(void);³ÌÐòÀý×ÓÈçÏ£º
#include <conio.h>
int main(void)
{
   c ......

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    emacswiki.org
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