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C/C++ code:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define BUF_SIZE 1024*8
int main()
{
int fds, fdd;
char buf[BUF_SIZE];
size_t hasread = 0;
fds = open("filea", O_RDONLY);
fdd = open("fileb", O_WRONLY, O_CREAT);
if(fds && fdd)
{
while((hasread = read(fds, buf, sizeof(buf))) > 0)
{
write(fdd, buf, hasread);
}
close(fds);
close(fdd);
}




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