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- // File from page 238 in "Thinking in C++" by Bruce Eckel
- //////////////////////////////////////////////////
- // From the compressed package ECKELT01.ZIP 2/21/95
- // Copyright (c) Bruce Eckel, 1995
- // Source code file from the book "Thinking in C++",
- // Prentice Hall, 1995, ISBN: 0-13-917709-4
- // All rights reserved EXCEPT as allowed by the following
- // statements: You may freely use this file for your own
- // work, including modifications and distribution in
- // executable form only. You may copy and distribute this
- // file, as long as it is only distributed in the complete
- // (compressed) package with the other files from this
- // book and you do not remove this copyright and notice.
- // You may not distribute modified versions of the source
- // code in this package. This package may be freely placed
- // on bulletin boards, internet nodes, shareware disks and
- // product vendor disks. You may not use this file in
- // printed media without the express permission of the
- // author. Bruce Eckel makes no
- // representation about the suitability of this software
- // for any purpose. It is provided "as is" without express
- // or implied warranty of any kind. The entire risk as to
- // the quality and performance of the software is with
- // you. Should the software prove defective, you assume
- // the cost of all necessary servicing, repair, or
- // correction.
- // If you think you've found an error, please
- // email all modified files with loudly commented changes
- // to: eckel@aol.com (please use the same
- // address for non-code errors found in the book).
- //////////////////////////////////////////////////
-
- //: FORMAT.CPP -- Formatting functions
- #include <fstream.h>
- #define D(a) T << #a << endl; a
- ofstream T("format.out");
-
- main() {
- D(int i = 47;)
- D(float f = 2300114.414159;)
- char* s = "Is there any more?";
-
- D(T.setf(ios::unitbuf);)
- D(T.setf(ios::stdio);)
-
- D(T.setf(ios::showbase);)
- D(T.setf(ios::uppercase);)
- D(T.setf(ios::showpos);)
- D(T << i << endl;) // Default to dec
- D(T.setf(ios::hex, ios::basefield);)
- D(T << i << endl;)
- D(T.unsetf(ios::uppercase);)
- D(T.setf(ios::oct, ios::basefield);)
- D(T << i << endl;)
- D(T.unsetf(ios::showbase);)
- D(T.setf(ios::dec, ios::basefield);)
- D(T.setf(ios::left, ios::adjustfield);)
- D(T.fill('0');)
- D(T << "fill char: " << T.fill() << endl;)
- D(T.width(10);)
- T << i << endl;
- D(T.setf(ios::right, ios::adjustfield);)
- D(T.width(10);)
- T << i << endl;
- D(T.setf(ios::internal, ios::adjustfield);)
- D(T.width(10);)
- T << i << endl;
- D(T << i << endl;) // Without width(10)
-
- D(T.unsetf(ios::showpos);)
- D(T.setf(ios::showpoint);)
- D(T << "prec = " << T.precision() << endl;)
- D(T.setf(ios::scientific, ios::floatfield);)
- D(T << endl << f << endl;)
- D(T.setf(ios::fixed, ios::floatfield);)
- D(T << f << endl;)
- D(T.setf(0, ios::floatfield);) // Automatic
- D(T << f << endl;)
- D(T.precision(20);)
- D(T << "prec = " << T.precision() << endl;)
- D(T << endl << f << endl;)
- D(T.setf(ios::scientific, ios::floatfield);)
- D(T << endl << f << endl;)
- D(T.setf(ios::fixed, ios::floatfield);)
- D(T << f << endl;)
- D(T.setf(0, ios::floatfield);) // Automatic
- D(T << f << endl;)
-
- D(T.width(10);)
- T << s << endl;
- D(T.width(40);)
- T << s << endl;
- D(T.setf(ios::left, ios::adjustfield);)
- D(T.width(40);)
- T << s << endl;
-
- D(T.unsetf(ios::showpoint);)
- D(T.unsetf(ios::unitbuf);)
- D(T.unsetf(ios::stdio);)
- }
-