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#include <iostream>
#include <fcntl.h>
using namespace std;
int main()
{
char buf1[]="abcdefghij";
int fd;
if(fd=open("testfile",O_RDWR|O_CREAT|O_TRUNC,S_IRWXU) <0)
{
cout < <"open error" < <enstfdl;
}
cout < <fd < <endl;
if(write(fd,buf1,10)!=10)
{
cout < <"write error" < <endl;
}
close(fd);
return 0;
}
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