C++/Vector/vector back — различия между версиями
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Текущая версия на 13:27, 25 мая 2010
Demonstrating the STL vector back and pop_back operations
<source lang="cpp">
- include <iostream>
- include <vector>
- include <string>
using namespace std; int main() {
string s("abcdefghij"); vector<char> vector1(s.begin(), s.end()); while (vector1.size() > 0) { cout << vector1.back(); vector1.pop_back(); } cout << endl; return 0;
} /* jihgfedcba
*/ </source>
Get the last element in the vector
<source lang="cpp">
- include <iostream>
using std::cout; using std::endl;
- include <vector> // vector class-template definition
- include <algorithm> // copy algorithm
- include <iterator> // ostream_iterator iterator
- include <stdexcept> // out_of_range exception
int main() {
int array[ 6 ] = { 1, 2, 3, 4, 5, 6 }; std::vector< int > integers( array, array + 6 ); std::ostream_iterator< int > output( cout, " " ); integers.push_back( 2 ); integers.push_back( 3 ); integers.push_back( 4 ); cout << "Vector integers contains: "; std::copy( integers.begin(), integers.end(), output ); cout << "\nLast element of integers: " << integers.back(); return 0;
} /* Vector integers contains: 1 2 3 4 5 6 2 3 4 Last element of integers: 4
*/ </source>