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integer literal

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Inhaltsverzeichnis

[Bearbeiten] Syntax

[0-9]+ type_suffix (1)
0 [0-7]+ type_suffix (2)
0 x [0-9a-b]+ type_suffix (3)

[Bearbeiten] Erklärung

# Dezimaldarstellung
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# Decimal notation
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# Octal Notation
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# Octal notation
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# Hexadezimal
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# Hexadecimal notation
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[Bearbeiten] Typen von Suffix

, (Kein Suffix)
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;(no suffix)
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int
u
unsigned int
l
long
ul
unsigned long
ll (seit C++11)
long long
ull (seit C++11)
unsigned long long

[Bearbeiten] Notes

  • Letters in Integer-Konstanten sind Groß-und Kleinschreibung .
    Original:
    Letters in integer constants are case-insensitive.
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[Bearbeiten] Beispiel

std::cout << 123    << '\n'
          << 0123   << '\n'
          << 0x123  << '\n'
          << 12345678901234567890UL << '\n'
          << -1u    << '\n'
          << -1ull  << '\n';

Output: 

123
83
291
12345678901234567890
4294967295
18446744073709551615
(Ausgabe von einem x86_64 Prozessor)
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(output from an x86_64 processor)
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