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      std::numeric_limits::min

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      C++
       
      Bibliothèque d'utilitaires
       
      Soutien aux types fondamentaux
      Les types de base
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      Basic types
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      Types fondamentaux
      Fixe les types entiers largeur (C++11)
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      Numeric limits
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      C numérique limite interface
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      std::numeric_limits
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      numeric_limits::min
      numeric_limits::lowest (C++11)
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      numeric_limits::epsilon
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      numeric_limits::infinity
      numeric_limits::quiet_NaN
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      float_round_style
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      static T min()
      		 (avant C++11)
      staticconstexpr T min()
      		 (depuis C++11)
      Retourne la valeur minimale représentable fini par le T type numérique. Pour flotter types de points de dénormalisation renvoie la valeur minimale positif normalisé. N'a de sens que pour les types bornées et non bornées pour les types non signés, c'est-à-types qui représentent un ensemble infini de valeurs négatives n'ont aucun minimum significatif .
      Original:
      Returns the minimum finite value representable by the numeric type T. For floating point types with denormalization returns the minimum positive normalized value. Only meaningful for bounded types and for unbounded unsigned types, that is, types that represent an infinite set of negative values have no meaningful minimum.
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      Sommaire

      [modifier]Retourne la valeur

      Tstd::numeric_limits<T>::min()
      /* non-specialized */ T();
      boolfalse
      charCHAR_MIN
      signedcharSCHAR_MIN
      unsignedchar​0​
      wchar_tWCHAR_MIN
      char16_t​0​
      char32_t​0​
      shortSHRT_MIN
      unsignedshort​0​
      intINT_MIN
      unsignedint​0​
      longLONG_MIN
      unsignedlong​0​
      longlongLLONG_MIN
      unsignedlonglong​0​
      floatFLT_MIN
      doubleDBL_MIN
      longdoubleLDBL_MIN

      [modifier]Exceptions

      noexcept specification:  
      noexcept
         (depuis C++11)

      [modifier]Exemple

      Illustre l'utilisation de types typedef, et la différence dans le signe du résultat entre les types entiers et en virgule flottante
      Original:
      Demonstrates the use with typedef types, and the difference in the sign of the result between integer and floating-point types
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      #include <limits>#include <cstddef>#include <iostream>int main(){std::cout<<"short: "<<std::dec<<std::numeric_limits<short>::min()<<" or "<<std::hex<<std::showbase<<std::numeric_limits<short>::min()<<'\n'<<"int: "<<std::dec<<std::numeric_limits<int>::min()<<std::showbase<<" or "<<std::hex<<std::numeric_limits<int>::min()<<'\n'<<std::dec<<"ptrdiff_t: "<<std::numeric_limits<std::ptrdiff_t>::min()<<std::showbase<<" or "<<std::hex<<std::numeric_limits<std::ptrdiff_t>::min()<<'\n'<<"float: "<<std::numeric_limits<float>::min()<<" or "<<std::hexfloat<<std::numeric_limits<float>::min()<<'\n'<<"double: "<<std::defaultfloat<<std::numeric_limits<double>::min()<<" or "<<std::hexfloat<<std::numeric_limits<double>::min()<<'\n';}

      Résultat : 

      short: -32768 or 0x8000 int: -2147483648 or 0x80000000 ptrdiff_t: -9223372036854775808 or 0x8000000000000000 float: 1.17549e-38 or 0x1p-126 double: 2.22507e-308 or 0x1p-1022

      [modifier]Voir aussi

      [
      statique
      Original:
      static
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      ]       (C++11)
      renvoie la plus petite valeur finie du type donné
      Original:
      returns the lowest finite value of the given type
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      (fonction membre publique statique)[edit]
      [
      statique
      Original:
      static
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      ]
      retourne la plus petite valeur positive inférieure à la normale de la donnée à virgule flottante de type
      Original:
      returns the smallest positive subnormal value of the given floating-point type
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      (fonction membre publique statique)[edit]
      [
      statique
      Original:
      static
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      ]
      renvoie la plus grande valeur finie du type donné
      Original:
      returns the largest finite value of the given type
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      (fonction membre publique statique)[edit]
      Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/types/numeric_limits/min&oldid=49651 »
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