Program and particulars below.
When line 27 is commented out, line 26 is output. When line 27 is not
commented, line 26 is not output except that if x.file contains a line feed the
null line line 26 & line 27 are output. If x.file does not contain a line feed,
only line 27 is output.
Does the line feed have an effect on the 'cout <<' of line 26 of the program?
Note. The code is awful and this is an example.
art
g++-4 (GCC) 4.3.2 20080827 (beta) 2
x.cpp
1 # include <ios>
2 # include <iomanip>
3 # include <fstream>
4 # include <iostream>
5 # include <sstream>
6
7 using namespace std;
8
9 ifstream x("x.file", ios::in);
10
11 struct y {
12 double a;
13 double b;
14 } yNot;
15
16 int main(int argc, char** argv) {
17 char Line[512];
18 long LineNo = 0;
19 while ( !x.eof() ) {
20 LineNo++;
21 x.getline(Line, 512);
22 istringstream Phfft(Line);
23 yNot.a = -1;
24 yNot.b = -2;
25 Phfft >> yNot.a >> yNot.b;
26 cout << setw(4) << LineNo << ": " << Line;
27 cout << " a:" << yNot.a << " b:" << yNot.b;
28 cout << endl;
29 }
30 return 0;
31 }
x.file
1 2<lf>
<nada>
