C++ algoritam equal()funkcija uspoređuje elemente u oba spremnika i vraća pravu vrijednost ako se utvrdi da se svi elementi u oba spremnika podudaraju. Prvi raspon je od [prvi1,zadnji1), a drugi počinje od prvi2.

Sintaksa

 template bool equal(InputIterator1 first1, InputIterator1 last1,InputIterator2 first2); template bool equal(InputIterator1 first1, InputIterator1 last1, InputIterator2 first1, BinaryPredicate pred); 

Parametar

prvo1 : To je ulazni iterator za prvi element [first1, last1).

posljednji1 : To je ulazni iterator posljednjeg elementa [first1, last1).

prvo2 : To je ulazni iterator za prvi element [first2, last2).

prije : To je binarna funkcija koja prihvaća dva elementa kao argumente i izvršava zadatak koji je osmislila funkcija.

Povratna vrijednost

Funkcija vraća vrijednost true ako se svi elementi u oba spremnika podudaraju, inače vraća false.

Primjer 1

 #include #include #include using namespace std; bool newpredicate(int m, int n) { return(m==n); } int main() { int newints[]={20,40,60,80,100}; std::vector newvector(newints, newints+5); if(std::equal(newvector.begin(),newvector.end(),newints)) std::cout&lt;<'both the containers have matching elements.
'; else std::cout<<'both difference newvector[3]="81;" if(std::equal(newvector.begin(),newvector.end(),newints,newpredicate)) equal containers.
'; do not elements. 
'; return 0; } < pre> <p> <strong>Output:</strong> </p> <pre> Both the containers have matching elements. Both the containers do not have equal elements. </pre> <h2>Example 2</h2> <pre> #include using namespace std; int main() { int u1[]={10,20,30,40,50}; std::vector vec_1(u1,u1+sizeof(u1)/sizeof(int)); std::cout&lt;<'the vector consists of:'; for(unsigned int k="0;" k<vec_1.size(); k++) std::cout<<' '<<vec_1[k]; std::cout<<'
'; if(std::equal(vec_1.begin(),vec_1.end(),u1)) std::cout<<'both the containers have equal elements.
'; else cout<<'both different elements.'; } < pre> <p> <strong>Output:</strong> </p> <pre> The vector consists of: 10, 20,30,40,50 Both the containers have equal elements. </pre> <h2>Complexity</h2> <p>The function has linear complexity from the first1 element to the last1 element.</p> <h2>Data races</h2> <p>Objects in both ranges are accessed.</p> <h2>Exceptions</h2> <p>The function throws an exception if any of the argument throws one. </p> <br></'the></pre></'both>

Primjer 2

 #include using namespace std; int main() { int u1[]={10,20,30,40,50}; std::vector vec_1(u1,u1+sizeof(u1)/sizeof(int)); std::cout&lt;<\'the vector consists of:\'; for(unsigned int k="0;" k<vec_1.size(); k++) std::cout<<\' \'<<vec_1[k]; std::cout<<\'
\'; if(std::equal(vec_1.begin(),vec_1.end(),u1)) std::cout<<\'both the containers have equal elements.
\'; else cout<<\'both different elements.\'; } < pre> <p> <strong>Output:</strong> </p> <pre> The vector consists of: 10, 20,30,40,50 Both the containers have equal elements. </pre> <h2>Complexity</h2> <p>The function has linear complexity from the first1 element to the last1 element.</p> <h2>Data races</h2> <p>Objects in both ranges are accessed.</p> <h2>Exceptions</h2> <p>The function throws an exception if any of the argument throws one. </p> <br></\'the>

Složenost

Funkcija ima linearnu složenost od prvog1 elementa do posljednjeg1 elementa.

Utrke podataka

Pristupa se objektima u oba raspona.

Iznimke

Funkcija izbacuje iznimku ako je bilo koji argument izbaci.