std::set_symmetric_difference
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Déclaré dans l'en-tête <algorithm> | ||
template<class InputIt1, class InputIt2, class OutputIt > OutputIt set_symmetric_difference( InputIt1 first1, InputIt1 last1, | (1) | |
template<class InputIt1, class InputIt2, class OutputIt, class Compare > | (2) | |
Copie les éléments de la gamme
[first1, last1) triés qui ne se trouvent pas dans la gamme [first2, last2) triés et les éléments de la gamme [first2, last2) triés qui ne se trouvent pas dans la gamme [first1, last1) triés au début plage à d_first. La plage résultante est également triée. La première version prévoit à la fois d'entrée se situe à trier avec operator<, la deuxième version s'attend à ce qu'ils soient triés à la comp fonction de comparaison donnée. Si un élément est trouvé m fois en [first1, last1) et n fois dans [first2, last2), il sera copié dans d_first exactement std::abs(m-n) fois. Si m>n, le m-n dernier de ces éléments sont copiés à partir [first1,last1), sinon les éléments n-m derniers sont copiés à partir [first2,last2). La gamme résultante ne peut pas faire double emploi avec l'une des plages d'entrée .Original:
Copies the elements from the sorted range
[first1, last1) which are not found in the sorted range [first2, last2) and the elements from the sorted range [first2, last2) which are not found in the sorted range [first1, last1) to the range beginning at d_first. The resulting range is also sorted. The first version expects both input ranges to be sorted with operator<, the second version expects them to be sorted with the given comparison function comp. If some element is found m times in [first1, last1) and n times in [first2, last2), it will be copied to d_first exactly std::abs(m-n) times. If m>n, then the last m-n of those elements are copied from [first1,last1), otherwise the last n-m elements are copied from [first2,last2). The resulting range cannot overlap with either of the input ranges.The text has been machine-translated via Google Translate.
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Sommaire |
[modifier]Paramètres
| first1, last1 | - | la première gamme d'éléments triés Original: the first sorted range of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| first2, last2 | - | la seconde plage d'éléments triés Original: the second sorted range of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| comp | - | comparison function which returns true if the first argument is less than the second. The signature of the comparison function should be equivalent to the following: bool cmp(const Type1 &a, const Type2 &b); The signature does not need to have const&, but the function must not modify the objects passed to it. |
| Type requirements | ||
-InputIt1 must meet the requirements of InputIterator. | ||
-InputIt2 must meet the requirements of InputIterator. | ||
-OutputIt must meet the requirements of OutputIterator. | ||
[modifier]Retourne la valeur
Iterator-delà de la fin de la gamme construit .
Original:
Iterator past the end of the constructed range.
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[modifier]Complexité
A comparaisons plupart 2·(N1+N2-1), où N1=std::distance(first1, last1) et N2=std::distance(first2, last2) .
Original:
At most 2·(N1+N2-1) comparisons, where N1=std::distance(first1, last1) and N2=std::distance(first2, last2).
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[modifier]Mise en œuvre possible
| First version |
|---|
template<class InputIt1, class InputIt2, class OutputIt> OutputIt set_difference(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, OutputIt d_first){while(first1 != last1){if(first2 == last2)returnstd::copy(first1, last1, d_first); if(*first1 <*first2){*d_first++=*first1++;}else{if(*first2 <*first1){*d_first++=*first2;}else{++first1;}++first2;}}returnstd::copy(first2, last2, d_first);} |
| Second version |
template<class InputIt1, class InputIt2, class OutputIt, class Compare> OutputIt set_difference(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, OutputIt d_first, Compare comp){while(first1 != last1){if(first2 == last2)returnstd::copy(first1, last1, d_first); if(comp(*first1, *first2)){*d_first++=*first1++;}else{if(comp(*first2, *first1)){*d_first++=*first2;}else{++first1;}++first2;}}returnstd::copy(first2, last2, d_first);} |
[modifier]Exemple
#include <iostream>#include <vector>#include <algorithm>#include <iterator>int main(){std::vector<int> v1{1,2,3,4,5,6,7,8};std::vector<int> v2{5, 7, 9,10};std::sort(v1.begin(), v1.end());std::sort(v2.begin(), v2.end()); std::vector<int> v_intersection; std::set_symmetric_difference( v1.begin(), v1.end(), v2.begin(), v2.end(), std::back_inserter(v_intersection)); for(int n : v_intersection)std::cout<< n <<' ';}
Résultat :
1 2 3 4 6 8 9 10
[modifier]Voir aussi
retourne vrai si un ensemble est un sous-ensemble de l'autre Original: returns true if one set is a subset of another The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) | |
calcule la différence entre deux ensembles Original: computes the difference between two sets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) | |
calcule l'union de deux ensembles Original: computes the union of two sets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) | |
calcule l'intersection des deux ensembles Original: computes the intersection of two sets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) | |
