How to force getline() to input one line at a time

Question

I need to input a certain number of strings, each one entered on a new line. When I try to use getline() in a loop, it inputs the first string then ends immediately.

Here's the problem I'm trying to solve, where you can see the style of input I'm going for: https://wcipeg.com/problem/ccc98s1

I've looked at cin.ignore() to fix the problem, but I can't seem to get it working right.

int n;
cin >> n;

for(int i = 0; i < n; i++) {
    string input;
    getline(cin, input);
    cout << "Line Entered: " << input << endl;
}

If you enter 2 for n, then try to enter two strings on separate lines then it does not work.

Please show your code. How else do you expect us to help spot the error? — Johnny Mopp, Jan 18 '19 at 00:26
@EvanWild to help going forward, you can do this in about 4 lines of code. If you read with `while (getline (std::cin, line))`, then just create a `stringstream` to read each word, check its `length`, and then `find` and `replace`, e.g. `std::string word; std::stringstream s (line); while (s >> word) if (word.length() == 4) line.replace (line.find (word, 0), 4, repl);` (with `const std::string repl = "****";` defined before hand) — David C. Rankin, Jan 18 '19 at 01:42

score 0 · Accepted Answer · answered Jan 18 '19 at 00:44

0

int n;
cin >> n;
cin.ignore(); // are you sure you tried this?

for(int i = 0; i < n; i++) {
    string input;
    getline(cin, input);
    cout << "Line Entered: " << input << endl;
}

answered Jan 18 '19 at 00:44

Andreas DM

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How to force getline() to input one line at a time

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