1: //find_first_of1a.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 find_first_of() "
11: "algorithm (default\nversion) to find the first occurrence of any "
12: "one of a range of integer values\nin a vector within another range "
13: "of integer values, also in a vector.";
14: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
16: int a1[] = {1, 2, 333, 3, 4, 5, 6, 444, 7, 8, 9, 10};
17: vector<int> v1(a1, a1+12);
18: cout << "\nHere are the contents of v1:\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[] = {333, 444, 555};
24: vector<int> v2(a2, a2+3);
25: cout << "\nHere are the contents of v2:\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: vector<int>::iterator p;
32: p = find_first_of(v1.begin(), v1.end(), v2.begin(), v2.end());
33: if (p != v1.end())
34: cout << "\nThe first instance of a value from v2 occurring in "
35: "v1 happens at location "
36: << (int)(p-v1.begin()+1) << ".";
37: else
38: cout << "\nNo instance of v2 was found in v1.";
39: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
41: p = find_first_of(p+1, v1.end(), v2.begin(), v2.end());
42: if (p != v1.end())
43: cout << "\nThe next instance of a value from v2 occurring in "
44: "v1 happens at location "
45: << (int)(p-v1.begin()+1) << ".";
46: else
47: cout << "\nNo further instance of a value from v2 occurring in "
48: "v1 was found.";
49: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
51: p = find_first_of(p+1, v1.end(), v2.begin(), v2.end());
52: if (p != v1.end())
53: cout << "\nThe next instance of a value from v2 occurring in "
54: "v1 happens at location "
55: << (int)(p-v1.begin()+1) << ".";
56: else
57: cout << "\nNo further instance of a value from v2 occurring in "
58: "v1 was found.";
59: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
60: }