1: //rotate1a.cpp
3: #include <iostream>
4: #include <vector>
5: #include <algorithm>
6: using namespace std;
8: int main()
9: {
10: cout << "\nThis program illustrates the use of the STL "
11: "rotate() algorithm to rotate\nthe order of all, or "
12: "just some, of the values in a vector of integers.";
13: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
15: int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
16: vector<int> v(a, a+10);
18: cout << "\nHere are the contents of the vector:\n";
19: for (vector<int>::size_type i=0; i<v.size(); i++)
20: cout << v.at(i) << " ";
21: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
23: cout << "\nNow we rotate the order of all values in the vector "
24: "\nin so that the fourth value becomes the first value.";
25: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
27: rotate(v.begin(), v.begin()+3, v.end());
29: cout << "\nHere are the revised contents of the vector:\n";
30: for (vector<int>::size_type i=0; i<v.size(); i++)
31: cout << v.at(i) << " ";
32: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
34: cout << "\nNext we rotate the order of the 2nd to the 6th values "
35: "in the vector so that\nthe third value in that group of values "
36: "becomes the first value of the group.";
37: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
39: rotate(v.begin()+1, v.begin()+3, v.begin()+6);
41: cout << "\nHere are the revised contents of the vector:\n";
42: for (vector<int>::size_type i=0; i<v.size(); i++)
43: cout << v.at(i) << " ";
44: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
45: }