/* F.T. Liu
 * 1/10/03
 * Demonstration program for Comp 1672
 * Reviews how to handle input from files
 */

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main()
{
    string filename;
    int search_num, num_from_file;
    ifstream input_file;

    // Give user message program summary
    cout << "This program asks you for a file name and a number.  It\n";
    cout << "then tells you whether or not that number appears in the file.\n";
    // Get the filename and search number from the user
    cout << "Please input the filename: ";
    cin >> filename;
    cout << "Please input the integer you want to search for: ";
    cin >> search_num;

    // Open the file - exit program if it can't be opened
    input_file.open(filename.c_str());
    if (!input_file.is_open()) {
        cout << "Unable to open file " << filename << endl;
        return 1;
    }
    // Look for the search number in the file until we reach end of file
    while (!input_file.eof()) {
       // get the next number out of the file
        input_file >> num_from_file;
        if (input_file) {
           // If we found a match, say so, and we're done!
            if (num_from_file == search_num) {
                cout << "The number " <<search_num << " was found in the file ";
                cout << filename << endl;
                input_file.close();
                return 0;
            }
        }
    }
    // We reached the end of the file, and did not find the number
    cout << "The number " << search_num << " was not found in the file ";
    cout << filename << endl;
    input_file.close();

    return 0;
}