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2)C ÓïÑÔÊÇËùνµÄ“СÄں˔ÓïÑÔ£¬¾ÍÆäÓïÑÔ±¾ÉíÀ´ËµºÜС£¨²»¶àµÄ¹Ø¼ü×Ö£¬³ÌÐòÁ÷³Ì¿ØÖÆ£¬Êý¾ÝÀàÐ͵ȣ©£»ËùÒÔ£¬C ÓïÑÔÄں˿ª·¢³öÀ´Ö®ºó£¬Dennis Ritchie ºÍ Brian Kernighan ¾ÍÓà C ±¾ÉíÖØÐ´ÁË 90% ÒÔÉ쵀 UNIX ϵͳº¯Êý£¬²¢ÇÒ°ÑÆäÖÐ×î³£ÓõIJ¿·Ö¶ÀÁ¢³öÀ´£¬ÐγÉÍ·ÎļþºÍ¶ÔÓ¦µÄ LIBRARY£¬C run-time library ¾ÍÊÇÕâÑùÐγɵġ£
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void test(void)
{
       unsigned long mid1,mid2,mid3;
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#include <stdio.h>
#include <unistd.h>
#define FOO "foo"
int main(void)
{
if(!access(FOO, F_OK))
{
if(!unlink(FOO))
{

}
else
{
printf("remove %s failed\n", FOO);
}
}
else
{
printf("%s not existed\ ......

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