c++:vector

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#include<iostream>#include<iomanip>#include<vector>using namespace std;int main(){vector<int> A(10);int n;int primecount = 0, i, j;cout << "enter a value>=2 as upper limit for prime numbers;";cin >> n;A[primecount++] = 2;for (i = 3; i < n; i++){if (primecount == A.size())A.resize(primecount + 10);if (i % 2 == 0)continue;j = 3;while (j <= i / 2 && i%j != 0)j += 2;if (j>i / 2)A[primecount++] = i;}for (i = 0; i < primecount; i++){cout << setw(5) << A[i];if ((i + 1) % 10 == 0)cout << endl;}cout << endl;}

#include<iostream>#include<deque>#include<algorithm>#include<iterator>using namespace std;int main(){deque<double>values;ostream_iterator<double>  output(cout, " ");values.push_front(2.2);values.push_front(3.3);values.push_back(1.1);cout << "values contains:";for (int i = 0; i < values.size(); i++)cout << values[i] << ' ';values.pop_front();cout << "\n after pop_front values contains:";copy(values.begin(), values.end(), output);values[1] = 5.5;cout << "\n after values[1]=5.5 values contains:";copy(values.begin(), values.end(), output);cout << endl;}

#include<iostream>#include<vector>#include<algorithm>#include<iterator>using namespace std;int main(){int A[] = { 1, 2, 3, 4, 5 };const int N = sizeof(A) / sizeof(int);vector<int>coll(A, A + N);ostream_iterator<int> output(cout, " ");cout << "list coll contains:";copy(coll.begin(), coll.end(), output);vector<int>::iterator pos = coll.begin();cout << "\n the first element is:" << *pos;vector<int>::reverse_iterator rpos = coll.rbegin();cout << "\n the last element is:" << *rpos << endl;back_insert_iterator<vector<int>> iter(coll);*iter = 66;back_inserter(coll) = 88;copy(coll.begin(), coll.end(), output);cout << endl;}

#include<iostream>#include<numeric>using namespace std;int mult(int x, int y){ return x*y; };int main(){int a[]={1, 2, 3, 4, 5};const int n = sizeof(a) / sizeof(int);cout << "the result by multipling all elements in a is:" << accumulate(a, a + n, 1, mult) << endl;}

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