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    std::basic_string::compare

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    <metanoindex/>

     
    C++
     
    Bibliothque de chanes de caractres
    Chanes zro terminal
    Original:
    Null-terminated strings
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    Les chanes d'octets
    Chaines multi-octets
    Les chanes tendues
    Classes
    Original:
    Classes
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    basic_string
    char_traits
     
    std::basic_string
    Les fonctions membres
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    Member functions
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    basic_string::basic_string
    basic_string::operator=
    basic_string::assign
    basic_string::get_allocator
    Elment d'accs
    Original:
    Element access
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    basic_string::at
    basic_string::operator[]
    basic_string::front (C++11)
    basic_string::back (C++11)
    basic_string::data
    basic_string::c_str
    Les itrateurs
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    Iterators
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    basic_string::begin
    basic_string::cbegin
    (C++11)
    basic_string::end
    basic_string::cend
    (C++11)
    basic_string::rbegin
    basic_string::crbegin
    (C++11)
    basic_string::rend
    basic_string::crend
    (C++11)
    Capacit
    Original:
    Capacity
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    basic_string::empty
    basic_string::size
    basic_string::length
    basic_string::max_size
    basic_string::reserve
    basic_string::capacity
    basic_string::shrink_to_fit (C++11)
    Oprations
    Original:
    Operations
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    basic_string::clear
    basic_string::insert
    basic_string::erase
    basic_string::push_back
    basic_string::pop_back (C++11)
    basic_string::append
    basic_string::operator+=
    basic_string::compare
    basic_string::replace
    basic_string::substr
    basic_string::copy
    basic_string::resize
    basic_string::swap
    Recherche
    Original:
    Search
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    basic_string::find
    basic_string::rfind
    basic_string::find_first_of
    basic_string::find_first_not_of
    basic_string::find_last_of
    basic_string::find_last_not_of
    Constantes
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    Constants
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    basic_string::npos
    Tiers fonctions
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    Non-member functions
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    operator+
    operator==
    operator!=
    operator<
    operator>
    operator<=
    operator>=
    swap(std::basic_string)
    operator<<
    operator>>
    getline
    stoi
    stol
    stoll    		 (C++11)
    (C++11)
    (C++11)
    stoul
    stoull    		 (C++11)
    (C++11)
    stof
    stod
    stold    		 (C++11)
    (C++11)
    (C++11)
    to_string (C++11)
    to_wstring (C++11)
    Classes d'aide
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    Helper classes
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    hash<std::string>
    hash<std::wstring>
    hash<std::u32string>
    hash<std::u16string>    		 (C++11)
     
    <tbody> </tbody>
    int compare( const basic_string& str ) const;
    		 (1)
    int compare( size_type pos1, size_type count1, const basic_string& str ) const;
    		 (2)
    int compare( size_type pos1, size_type count1, const basic_string& str, size_type pos2, size_type count2 ) const;
    		 (3)
    int compare( const CharT* s ) const noexcept;
    		 (4)
    int compare( size_type pos1, size_type count1, const CharT* s ) const;
    		 (5)
    int compare( size_type pos1, size_type count1, const CharT* s, size_type count2 ) const;
    		 (6)
    Compare deux squences de caractres .
    Original:
    Compares two character sequences.
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    1)

    Compare cette chane str'. Tout d'abord, calcule le nombre de caractres comparer, comme par size_type rlen = std::min(size(), str.size()). Compare ensuite en appelant Traits::compare(data(), str.data(), rlen). Pour les chanes standards de cette fonction effectue caractre par caractre comparaison lexicographique. Si le rsultat est gal zro (les chanes sont gales ce jour), leurs tailles sont compars comme suit:
    Original:
    Compares this string to str. First, calculates the number of characters to compare, as if by size_type rlen = std::min(size(), str.size()). Then compares by calling Traits::compare(data(), str.data(), rlen). For standard strings this function performs character-by-character lexicographical comparison. If the result is zero (the strings are equal so far), then their sizes are compared as follows:
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    Condition Result Return value
    Traits::compare(data, arg, rlen) < 0 data is less than arg <0
    Traits::compare(data, arg, rlen) == 0 size(data) < size(arg) data is less than arg <0
    size(data) == size(arg) data is equal to arg 0
    size(data) > size(arg) data is greater than arg >0
    Traits::compare(data, arg, rlen) > 0 data is greater than arg >0

    2)

    Compare une chane [pos1, pos1+count1) de cette chane str' comme par basic_string(*this, pos1, count1).compare(str)
    Original:
    Compares a [pos1, pos1+count1) substring of this string to str as if by basic_string(*this, pos1, count1).compare(str)
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    3)

    Compare une chane [pos1, pos1+count1) de cette chane une chane de [pos2, pas2+count2)' str comme par basic_string(*this, pos1, count1).compare(basic_string(str, pos2, count2))
    Original:
    Compares a [pos1, pos1+count1) substring of this string to a substring [pos2, pas2+count2) of str as if by basic_string(*this, pos1, count1).compare(basic_string(str, pos2, count2))
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    4)

    Compare cette chane au dbut termine par NULL squence de caractres par le caractre point par s', comme par compare(basic_string(s))
    Original:
    Compares this string to the null-terminated character sequence beginning at the character pointed to by s, as if by compare(basic_string(s))
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    5)

    Compare une chane [pos1, pos1+count1) de cette chane au dbut termine par NULL squence de caractres par le caractre point par s', comme par basic_string(*this, pos, count1).compare(basic_string(s))
    Original:
    Compares a [pos1, pos1+count1) substring of this string to the null-terminated character sequence beginning at the character pointed to by s, as if by basic_string(*this, pos, count1).compare(basic_string(s))
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    6)

    Compare une chane [pos1, pos1+count1) de cette chane de caractres count2 premiers du tableau de caractres dont le premier caractre est soulign par l', comme par basic_string(*this, pos, count1).compare(basic_string(s, count2)). (Remarque: les caractres de s s+count2 peuvent inclure des caractres nuls))
    Original:
    Compares a [pos1, pos1+count1) substring of this string to the first count2 characters of the character array whose first character is pointed to by s, as if by basic_string(*this, pos, count1).compare(basic_string(s, count2)). (Note: the characters from s to s+count2 may include null characters))
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    Paramtres

    str -
    autre chane comparer
    Original:
    other string to compare to
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    s -
    pointeur vers la chane de caractres comparer
    Original:
    pointer to the character string to compare to
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    count1 -
    nombre de caractres de cette chane compore
    Original:
    number of characters of this string to compore
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    pos1 -
    position du premier caractre de cette chane comparer
    Original:
    position of the first character in this string to compare
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    count2 -
    nombre de caractres de la chane donne compore
    Original:
    number of characters of the given string to compore
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    pos2 -
    la position du premier caractre de la chane donne comparer
    Original:
    position of the first character of the given string to compare
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    Retourne la valeur

    valeur ngative si cette chane est moins de la squence de caractres autre, zro si les deux squences de caractres sont gaux, la valeur positive si cette chane est plus que la squence de caractres autre .
    Original:
    negative value if this string is less than the other character sequence, zero if the both character sequences are equal, positive value if this string is greater than the other character sequence.
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    Exceptions

    1)

    noexcept specification:  
    <tbody> </tbody>
    noexcept
       (depuis C++11)

    2-6)

    Peut lever les exceptions lances par les constructeurs basic_string correspondantes .
    Original:
    May throw the exceptions thrown by the corresponding basic_string constructors.
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    Mise en uvre possible

    template<class CharT, class Traits, class Alloc>
int basic_string<CharT, Traits, Alloc>::compare(const std::basic_string& str) const noexcept
{
    size_type lhs_sz = size();
    size_type rhs_sz = str.size();
    int result = traits_type::compare(data(), str.data(), std::min(lhs_sz, rhs_sz));
    if (result != 0)
        return result;
    if (lhs_sz < rhs_sz)
        return -1;
    if (lhs_sz > rhs_sz)
        return 1;
    return 0;
}

    Exemple

    This section is incomplete
    Reason: no example

    Voir aussi
    compare lexicographiquement deux chanes
    Original:
    lexicographically compares two strings
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    (fonction gnrique) [edit]
    renvoie une sous-chane
    Original:
    returns a substring
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    (fonction membre publique) [edit]
    dfinit comparaison lexicographique et le hachage de chanes
    Original:
    defines lexicographical comparison and hashing of strings
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    (classe gnrique) [edit]
    compare deux chanes en fonction de la localisation en cours
    Original:
    compares two strings in accordance to the current locale
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    (fonction) [edit]
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