1: //vector01.cpp
3: #include <iostream>
4: #include <string>
5: #include <vector>
6: using namespace std;
8: int main()
9: {
10: cout << "\nThis program illustrates all constructors of the STL "
11: "vector container class,\nas well as the empty() and size() "
12: "member functions, the size_type typedef, and\nthe v[i] method "
13: "of accessing vector components.";
14: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
16: //Create an empty vector
17: vector<int> v1;
18: if (v1.empty()) cout << "\nv1 is empty.\n";
19: cout << "Press Enter to continue ... "; cin.ignore(80, '\n');
21: //Create a vector filled with the default component-type value
22: vector<int> v2(5);
23: cout << "\nContents of v2: ";
24: for (vector<int>::size_type i=0; i<v2.size(); i++)
25: cout << v2[i] << " ";
26: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
28: //Create a vector filled with a specific component-type value
29: vector<double> v3(4, 3.14);
30: cout << "\nContents of v3: ";
31: for (vector<double>::size_type i=0; i<v3.size(); i++)
32: cout << v3[i] << " ";
33: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
35: //Create a vector using pointers to an integer array
36: int a[] = {2, 4, 6, 8, 10, 12};
37: vector<int> v4(a, a + sizeof(a)/sizeof(int));
38: cout << "\nContents of v4: ";
39: for (vector<int>::size_type i=0; i<v4.size(); i++)
40: cout << v4[i] << " ";
41: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
43: //Create a vector using pointers to a C-string
44: char s[] = "Hello";
45: vector<char> v5(s, s + strlen(s));
46: cout << "\nContents of v5: ";
47: for (vector<char>::size_type i=0; i<v5.size(); i++)
48: cout << v5[i] << " ";
49: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
51: //Create a new vector as a copy of an existing vector
52: vector<double> v6(v3); //or vector<double> v6 = v3;
53: cout << "\nContents of v6 same as those of v3: ";
54: for (vector<double>::size_type i=0; i<v6.size(); i++)
55: cout << v6[i] << " ";
56: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
57: }