44 lines
1.9 KiB
C++
44 lines
1.9 KiB
C++
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// fig19_20.cpp
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// C++20 text-formatting presentation types.
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#include <format>
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#include <iostream>
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int main() {
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// floating-point presentation types
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std::cout << "Display 17.489 with default, .1 and .2 precisions:\n"
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<< std::format("f: {0:f}\n.1f: {0:.1f}\n.2f: {0:.2f}\n\n", 17.489);
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std::cout << "Display 10000000000000000.0 with f, e, g and a\n"
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<< std::format("f: {0:f}\ne: {0:e}\ng: {0:g}\na: {0:a}\n\n",
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10000000000000000.0);
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// integer presentation types; # displays a base prefix
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std::cout << "Display 100 with d, #b, #o and #x:\n"
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<< std::format(
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"d: {0:d}\n#b: {0:#b}\n#o: {0:#o}\n#x: {0:#x}\n\n", 100);
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// character presentation type
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std::cout << "Display 65 and 97 with c:\n"
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<< std::format("{:c} {:c}\n\n", 65, 97);
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// string presentation type
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std::cout << "Display \"hello\" with s:\n"
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<< std::format("{:s}\n", "hello");
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}
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/**************************************************************************
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* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
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* Pearson Education, Inc. All Rights Reserved. *
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* *
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* DISCLAIMER: The authors and publisher of this book have used their *
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* best efforts in preparing the book. These efforts include the *
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* development, research, and testing of the theories and programs *
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* to determine their effectiveness. The authors and publisher make *
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* no warranty of any kind, expressed or implied, with regard to these *
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* programs or to the documentation contained in these books. The authors *
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* and publisher shall not be liable in any event for incidental or *
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* consequential damages in connection with, or arising out of, the *
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* furnishing, performance, or use of these programs. *
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**************************************************************************/
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