1: //adjacent_difference1a.cpp
3: #include <iostream>
4: #include <vector>
5: #include <numeric>
6: using namespace std;
8: int main()
9: {
10: cout << "\nThis program illustrates the use of the STL "
11: "adjacent_difference() algorithm\n(default version) from "
12: "<numeric> to find the differences between successive\npairs "
13: "of integers in one vector, and write them to a second vector.";
14: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
16: vector<int> v1{10, 12, 16, 22, 30}; //since C++11
17: cout << "\nHere are the values in the first vector:\n";
18: for (int i : v1) cout << i << " "; //since C++11
19: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
21: vector<int> v2{1, 3, 5, 7, 9, 11, 13};
22: cout << "\nAnd here are the values in the second vector:\n";
23: for (int i : v2) cout << i << " "; //since C++11
24: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
26: cout << "\nNow we use ajacent_difference() to compute the "
27: "adjacent differences for the\nentire first vector, and "
28: "write them to the second vector, starting at the\nsecond "
29: "position of the second vector.";
30: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
32: //since C++11 ...
33: auto p = adjacent_difference(v1.begin(), v1.end(), v2.begin()+1);
35: cout << "\nHere are the integer values in the second vector "
36: "after this has been done:\n";
37: for (int i : v2) cout << i << " "; //since C++11
38: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
40: cout << "\nThe value pointed to by the iterator "
41: "returned by adjacent_difference() is ";
42: cout << *p << ".";
43: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
44: }