Man Page find.3

                       Standard C++ Library
             Copyright 1998, Rogue Wave Software, Inc.

NAME

     find

      - Finds an occurrence of value in a sequence.

SYNOPSIS

     #include <algorithm>
     template <class InputIterator, class T>
      InputIterator find(InputIterator first,
                          InputIterator last,
                          const T& value);

DESCRIPTION

     The find algorithm lets you search for the first  occurrence
     of  a particular value in a sequence. find_returns the first
     iterator i in the range [first, last) for which the  follow-
     ing condition holds:

     *i == value.

     If find does not find a match  for  value,  it  returns  the
     iterator last.

     Type T must be EqualityComparable.

COMPLEXITY

     find performs at most last-first comparisons.

EXAMPLE

     //
     // find.cpp
     //
      #include <vector>
      #include <algorithm>
      #include <functional>
      #include <iostream>

     using namespace std;

     int main()
      {
       typedef vector<int>::iterator iterator;
       int d1[10] = {0,1,2,2,3,4,2,2,6,7};

        // Set up a vector
       vector<int> v1(d1,d1 + 10);

        // Try find
       iterator it1 = find(v1.begin(),v1.end(),3);
        // it1 = v1.begin() + 4;

        // Try find_if
       iterator it2 =
       find_if(v1.begin(),v1.end(),bind1st(equal_to<int>(),3));
        // it2 = v1.begin() + 4

        // Try both adjacent_find variants
       iterator it3 = adjacent_find(v1.begin(),v1.end());
        // it3 = v1.begin() +2


       iterator it4 =
          adjacent_find(v1.begin(),v1.end(),equal_to<int>());
        // v4 = v1.begin() + 2

        // Output results
       cout << *it1 << " " << *it2 << " " << *it3 << " "
             << *it4 << endl;

       return 0;
      }

     Program Output




     3 3 2 2

WARNINGS

     If your compiler does not support default  template  parame-
     ters,  then you always need to supply the Allocator template
     argument. For instance, you have to write:

     vector<int,allocator<int> >

     instead of:

     vector<int>

     If your compiler does not support namespaces,  then  you  do
     not need the using declaration for std.

SEE ALSO

     adjacent_find, find_first_of, find_if