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: int a1[] = {10, 12, 16, 22, 30};
17: vector<int> v1(a1, a1+5);
18: cout << "\nHere are the values in the first vector:\n";
19: for (vector<int>::size_type i=0; i<v1.size(); i++)
20: cout << v1.at(i) << " ";
21: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
23: int a2[] = {1, 3, 5, 7, 9, 11, 13};
24: vector<int> v2(a2, a2+7);
25: cout << "\nAnd here are the values in the second vector:\n";
26: for (vector<int>::size_type i=0; i<v2.size(); i++)
27: cout << v2.at(i) << " ";
28: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
30: cout << "\nNow we use ajacent_difference() to compute the "
31: "adjacent differences for the\nentire first vector, and "
32: "write them to the second vector, starting at the\nsecond "
33: "position of the second vector.";
34: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
36: vector<int>::iterator p;
37: p = adjacent_difference(v1.begin(), v1.end(), v2.begin()+1);
39: cout << "\nHere are the integer values in the second vector "
40: "after this has been done:\n";
41: for (vector<int>::size_type i=0; i<v2.size(); i++)
42: cout << v2.at(i) << " ";
43: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
45: cout << "\nThe value pointed to by the iterator "
46: "returned by adjacent_difference() is ";
47: cout << *p << ".";
48: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
49: }