Hi,
The problem is that
fout << i*0.1;
does not introduce any separation between the numbers.
Hence the data ile looks like:
00.10.2
which is properly parse as
00.10
.2
error (which result in 'arr' to be unmodified and stay 0.2)
To fix your problem use
fout << i*0.1 << ' ';
Cheers,
Philippe
-----Original Message-----
From: owner-roottalk@pcroot.cern.ch [mailto:owner-roottalk@pcroot.cern.ch]On
Behalf Of Dong Zhou
Sent: Monday, September 29, 2003 7:04 AM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] iostream
dear rooters:
i feel there is something wrong with the 'fin >>' method.
my code is like this:
// tmp.cpp
void tmp(){
ofstream fout ("tmp.dat");
Double_t arr;
for(int i=0;i<3;++i){
fout << i*0.1;
}
fout.close();
ifstream fin("tmp.cpp");
for(i=0;i<3;++i){
fin >> arr;
cout << i << ' ' << arr << endl;
}
}
it should be 0 0.1 0.2
but the output turns out to be 0.1 0.2 0.2
it seems that it take 00.1 as 0.1
i am not sure if i have made any mistake. what is ur opinion?
thank u.
zhou, dong
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