1: //vector17.cpp
3: #include <iostream>
4: #include <fstream>
5: #include <string>
6: #include <vector>
7: using namespace std;
9: int main()
10: {
11: cout << "\nThis program illustrates a vector of strings. It shows "
12: "how to read the lines\nof a textfile into a vector of strings "
13: "and then display the contents of the\nresulting vector on the "
14: "screen. It thus provides a simple \"display textfile\"\nroutine. "
15: "The user is asked to enter the name of the textfile and choose "
16: "how\nmany lines to show at a time.";
17: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
19: vector<string> lineList;
20: string fileName;
21: int numLinesToDisplay;
23: cout << "\nEnter name of file to display "
24: "(include full path if necessary):\n";
25: getline(cin, fileName);
26: cout << "How many lines do you want to see at once? ";
27: cin >> numLinesToDisplay; cin.ignore(80, '\n');
29: ifstream inFile(fileName.c_str());
30: string line;
31: while(getline(inFile, line)) lineList.push_back(line);
32: int lineCount = 0;
33: for (vector<string>::size_type i=0; i<lineList.size(); i++)
34: {
35: cout << lineList[i] << endl;
36: ++lineCount;
37: if (lineCount == numLinesToDisplay)
38: {
39: cout << "Press Enter to continue ... ";
40: cin.ignore(80, '\n');
41: lineCount = 0;
42: }
43: }
44: cout << "\n===== The entire file has now been displayed. =====\n";
45: cout << "Press Enter to continue ... "; cin.ignore(80, '\n');
46: }