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C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(12)

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1.       ldexpº¯Êý
ldexpº¯ÊýµÄ¹¦ÄÜÊǼÆËãvalue*2µÄÃÝ£¬ÆäÓ÷¨Îª£ºdouble ldexp(double value, int exp);³ÌÐòʵÀýÈçÏ£º
    #include <stdio.h>
#include <math.h>
int main(void)
{
     double value;
     double x = 2;
     value = ldexp(x,3);
     printf("The ldexp value is: %lf\n",value);
     return 0;
}
2.       lfindº¯Êý
lfindº¯ÊýµÄ¹¦ÄÜÊÇÖ´ÐÐÏßÐÔËÑË÷£¬ÆäÓ÷¨Îª£ºvoid *lfind(void *key, void *base, int *nelem, int width,int (*fcmp)());   ³ÌÐòʵÀý´úÂëÈçÏ£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;
}
3.       lockº¯Êý
lockº¯ÊýµÄ¹¦ÄÜÊÇÉèÖÃÎļþ¹²ÏíËø£¬ÆäÓ÷¨Îª£ºint lock(int handle, long offset, long length);³ÌÐòʵÀý´úÂëÈçÏ£º
#include <io.h>
#include <fcntl.h>
#include <sys\stat.h>
#include <process.h>
#include <share.h>
#include <stdio.h>
int main(void)
{
   int handle, status;
   long length;
   handle = sopen("c:\\autoexec.bat",
      O_RDONLY,SH_DENYNO,S_IREAD);
   if (ha


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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£ ......

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2>unzip.c
2>D:\Program
Files\VC\include\cstdio(25) : error C2143:
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