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1. qsortº¯Êý
qsortº¯ÊýµÄ¹¦ÄÜÊÇʹÓÿìËÙÅÅÐòÀý³Ì½øÐÐÅÅÐò£¬ÆäÓ÷¨Îª£ºvoid qsort(void *base, int nelem, int width, int (*fcmp)());³ÌÐòʵÀýÈçÏ£º
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int sort_function( const void *a, const void *b);
char list[5][4] = { "cat", "car", "cab", "cap", "can" };
int main(void)
{
int x;
qsort((void *)list, 5, sizeof(list[0]), sort_function);
for (x = 0; x < 5; x++)
printf("%s\n", list[x]);
return 0;
}
int sort_function( const void *a, const void *b)
{
return( strcmp(a,b) );
}
2. putwº¯Êý
putwº¯ÊýµÄ¹¦ÄÜÊǰÑÒ»×Ö·û»ò×ÖË͵½Á÷ÖУ¬ÆäÓ÷¨Îªint putw(int w, FILE *stream);³ÌÐòʵÀý´úÂëÈçÏ£º
#include <stdio.h>
#include <stdlib.h>
#define FNAME "test.$$$"
int main(void)
{
FILE *fp;
int word;
fp = fopen(FNAME, "wb");
if (fp == NULL)
{
printf("Error opening file %s\n", FNAME);
exit(1);
}
word = 94;
putw(word,fp);
if (ferror(fp))
printf("Error writing to file\n");
else
printf("Successful write\n");
fclose(fp);
fp = fopen(FNAME, "rb");
if (fp == NULL)
{
printf("Error opening file %s\n", FNAME);
exit(1);
}
word = getw(fp);
if (ferror(fp))
printf("Error reading file\n");
else
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1. normvideoº¯Êý
mallocº¯ÊýµÄ¹¦ÄÜÊÇÑ¡ÔñÕý³£ÁÁ¶È×Ö·û£¬ÆäÓ÷¨Îª£ºvoid normvideo(void);³ÌÐòʵÀýÈçÏ£º
#include < ......
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1. parsfnmº¯Êý
parsfnmº¯ÊýµÄ¹¦ÄÜÊÇ·ÖÎöÎļþÃû£¬ÆäÓ÷¨Îª£ºchar *parsfnm (char *cmdline, struct fcb *fcbptr, ......