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linuxÏÂÎļþÎÊÌâ - C/C++ / CÓïÑÔ

C/C++ code:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>

#define _FILE_OFFSET_BITS 64
#define __USE_FILE_OFFSET64
#define __USE_LARGEFILE64
#define _LARGEFILE64_SOURCE


void create()
{
int i,j;
int rnd;
FILE * fp = fopen("3KB.txt","w");

if(fp == NULL)
{
printf("Can not open file\n");
exit(2);
}

srand(time(0));

printf("creating list...\n");

for(j = 0; j < 3; ++j)
{
for(i = 0; i < 1024; ++i)
{
rnd = rand() % 4;//0,1,2,3
switch(rnd)
{
case 0:
fputc('A',fp);
break;
case 1:
fputc('G',fp);
break;
case 2:
fputc('C',fp);
break;
case 3:
fputc('T',fp);
break;
}
}
}
}

void copy()
{
//¸´ÖÆ10·Ý´æÈëÎļþ
int i;
size_t bytes;
char temp[1024];

FILE * read, *write;
if((read = fopen("3KB.txt","r")) == NULL || (write = fopen("30KB.txt","a")) == NULL)
{
fputs(&q


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