Просмотр исходного текста страницы C++ Tutorial/STL Algorithms Non modifying sequence operations/equal

==equal algorithm: a deque and the first 2 elements of a list are not equal in all corresponding positions==


   
<source lang="cpp">#include <iostream>
#include <cassert>
#include <algorithm>
#include <string>
#include <list>
#include <deque>
#include <vector>
using namespace std;
int main()
{
  list<string> driver_list;
  vector<string> vec;
  deque<string> deq;
  driver_list.insert(driver_list.end(), "AAA");
  driver_list.insert(driver_list.end(), "BBBB");
  driver_list.insert(driver_list.end(), "CCCCC");
  deq.insert(deq.end(), "AAA");
  deq.insert(deq.end(), "DDDDDD");
  
  cout << (equal(deq.begin(), deq.end(),driver_list.begin()));
  return 0;
}</source>
<pre class=codeResult>0</pre>

==equal algorithm: a list and the first  3 elements of a vector are equal in all corresponding positions==


   
<source lang="cpp">#include <iostream>
#include <cassert>
#include <algorithm>
#include <string>
#include <list>
#include <deque>
#include <vector>
using namespace std;
int main()
{
  list<string> driver_list;
  vector<string> vec;
  deque<string> deq;
  driver_list.insert(driver_list.end(), "AAA");
  driver_list.insert(driver_list.end(), "BBBB");
  driver_list.insert(driver_list.end(), "CCCCC");
  vec.insert(vec.end(), "AAA");
  vec.insert(vec.end(), "BBBB");
  vec.insert(vec.end(), "CCCCC");
  vec.insert(vec.end(), "DDDDDD");
  cout<< (equal(driver_list.begin(), driver_list.end(),vec.begin()));
  return 0;
}</source>
<pre class=codeResult>1</pre>

==Use std::equal to compare vectors v1 and v2 for equality==


   
<source lang="cpp">#include <iostream>
using std::cout;
using std::endl;
#include <algorithm>
#include <vector>
#include <iterator>
int main()
{
   int a1[ 10 ] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
   int a2[ 10 ] = { 1, 2, 3, 4, 9, 6, 7, 8, 9, 10 };
   std::vector< int > v1( a1, a1 + 10 );
   std::vector< int > v2( a1, a1 + 10 );
   std::vector< int > v3( a2, a2 + 10 );
   std::ostream_iterator< int > output( cout, " " );
   cout << "Vector v1 contains: ";
   std::copy( v1.begin(), v1.end(), output );
   cout << "\nVector v2 contains: ";
   std::copy( v2.begin(), v2.end(), output );
   cout << "\nVector v3 contains: ";
   std::copy( v3.begin(), v3.end(), output );
   // compare vectors v1 and v2 for equality
   bool result = std::equal( v1.begin(), v1.end(), v2.begin() );
   cout << "\n\nVector v1 " << ( result ? "is" : "is not" )
      << " equal to vector v2.\n";
   return 0;
}</source>
<pre class=codeResult>Vector v1 contains: 1 2 3 4 5 6 7 8 9 10
Vector v2 contains: 1 2 3 4 5 6 7 8 9 10
Vector v3 contains: 1 2 3 4 9 6 7 8 9 10
Vector v1 is equal to vector v2.</pre>