std :: getline卡在管道输入的末尾

Question

I am failing to parse this file:

1

3
John Doe
Jane Smith
Jane Austen
1 2 3
2 1 3
2 3 1
1 2 3
3 1 2

With the following program:

#include <iostream>
#include <sstream>

int main( int argc, char * argv[] )
{

    int cases, candidates_number;
    char candidates[20][80];
    int votes[20][1000];
    int votes_count[20];

    std::string line;

    std::cin >> cases;
    std::cin.get();
    std::cin.get();

    for (int i=0; i<cases; i++) {

        std::cin >> candidates_number;
        std::cin.get();

        for (int j=0; j<candidates_number; j++) {
            std::cin.getline(candidates[j], sizeof(candidates[j]), '\n');
        }

        int votes_number = 0;

        while (std::getline(std::cin, line)) {
            if (line.empty()) {
                break;
            }
            std::cout << line;
            votes_number++;
        }

    }
    return 0;
}

In particular, the process gets stuck in the while loop after reading the last line of the file. I am invoking my program through the "Standard input" feature in Eclipse.

Why isn't std::getline failing and causing the program to finish?

---

Problem requirements:

Australian ballots require that voters rank all the candidates in order of choice. Initially only the first choices are counted, and if one candidate receives more than 50% of the vote then that candidate is elected. However, if no candidate receives more than 50%, all candidates tied for the lowest number of votes are eliminated. Ballots ranking these candidates first are recounted in favor of their highest-ranked non-eliminated candidate. This process of eliminating the weakest candidates and counting their ballots in favor of the preferred non-eliminated candidate continues until one candidate receives more than 50% of the vote, or until all remaining candidates are tied.

Input

The input begins with a single positive integer on a line by itself indicating the number of cases following, each as described below. This line is followed by a blank line. There is also a blank line between two consecutive inputs.

The first line of each case is an integer n$ \\le$20 indicating the number of candidates. The next n lines consist of the names of the candidates in order, each up to 80 characters in length and containing any printable characters. Up to 1,000 lines follow, each containing the contents of a ballot. Each ballot contains the numbers from 1 to n in some order. The first number indicates the candidate of first choice; the second number indicates candidate of second choice, and so on.

Output

The output of each test case consists of either a single line containing the name of the winner or several lines containing the names of all candidates who are tied. The output of each two consecutive cases are separated by a blank line.

Answer 1

The program was actually correct, but I was feeding the input file through Eclipse in the wrong way (it was treated as interactive input):

Using a program argument < input instead works as expected: