1: //vector02.cpp
3: #include <iostream>
4: #include <string>
5: #include <vector>
6: using namespace std;
8: int main()
9: {
10: cout << "\nThis program illustrates the difference between "
11: "using v[i] and using v.a(i)\nfor access to the "
12: "components of a vector v.";
13: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
15: //Create a vector of five integer values
16: int a[] = {1, 2, 3, 4, 5};
17: vector<int> v(a, a+5);
19: cout << "\nContents of v using v[i]: ";
20: for (vector<int>::size_type i=0; i<v.size(); i++)
21: cout << v[i] << " ";
22: cout << endl;
23: cout << "Press Enter to continue ... "; cin.ignore(80, '\n');
25: cout << "\nContents of v using v.at(i): ";
26: for (vector<int>::size_type i=0; i<v.size(); i++)
27: cout << v.at(i) << " ";
28: cout << endl;
29: cout << "Press Enter to continue ... "; cin.ignore(80, '\n');
31: cout << "\nNow let's look at the value of v[6] (if we can).\n";
32: cout << "Press Enter to continue ... "; cin.ignore(80, '\n');
33: cout << "Value of v[6]: " << v[6] << endl;
34: cout << "Press Enter to continue ... "; cin.ignore(80, '\n');
36: cout << "\nNow let's look at the value of v.at(6) (if we can).\n";
37: cout << "Press Enter to continue ... "; cin.ignore(80, '\n');
38: cout << "Value of v.at(6): " << v.at(6) << endl;
39: cout << "Press Enter to continue ... "; cin.ignore(80, '\n');
40: }