width() and setw()

[Alex Vinokur]

Both function width() and manipulator setw() set field width for _next_ output operation.
width() seems to be less handy because we should split a chain of <<.

Is there any situation in which width() is more preferable?

====== C++ code : File foo.cpp : BEGIN ======

#include <iostream>
#include <iomanip>
using namespace std;

int main ()
{
double f = 1.234;

cout.setf(ios:: fixed, ios::floatfield );
cout.precision( 2);

cout << f << endl
<< setw(7)
<< f << endl
<< f << endl;

cout << endl;

cout << f << endl;
cout.width (7);
cout << f << endl
<< f << endl;


return 0;
}

====== C++ code : File foo.cpp : END ========


====== Compilation & Run : BEGIN ======

$ g++ -v
[---omitted---]
gcc version 3.3.1 (cygming special)

$ g++ -W -Wall foo.cpp

$ a
1.23
1.23
1.23

1.23
1.23
1.23


====== Compilation & Run : END ========


--
=============== =============== =======
Alex Vinokur
mailto:alexvn@c onnect.to

http://mathforum.org/library/view/10978.html

news://news.gmane.org/gmane.comp.lang.c++.perfometer
=============== =============== =======