文件复制

#iostream
#fsteam
ifstream in;
ofstream out;
in.open(SourceFile,ios::binary);
if(in.fail())
{
 in.close();
 out.close();
 return 0;
}
out.open(NewFile,ios::binary);
if(out.fail())
{
 out.close();
 in.close();
 
 return 0;
}
else
{
 out<<in.rdbuf();
 out.close();
 in.close();
}