While using string function in C++ getting terminated by using substr() function

Question

** Im currently want to use whole string that it should contain space between them so Im using getline() function but after code getline() my code is getting terminated,I dont know why this happening**


using namespace std;

int main()
{
    int t;
    cin >> t;
    while (t--)
    {
        
        int n;
        cin >> n;
        while (n--)
        {
            string m;
            getline(cin, m);
            string s1 = m.substr(1);
            string s2 = m.substr(6);
            string s3 = m.substr(9);
            string s4 = m.substr(15);
            cout << s1 << s2 << s3 << s4 << endl;
        }

    }
    return 0;
}```

Before you assign the strings, print the length of `m`and then look at your code again. — Devolus, Feb 09 '21 at 11:41
Is your input at least 16 characters long? Otherwise, exceptions will be thrown. — molbdnilo, Feb 09 '21 at 11:41
If you verify, for instance with `cout << '|' << m << '|' << endl;`, that you actually read what you believe that you read, you will most likely notice that the string is empty, and that's because of [this](https://stackoverflow.com/questions/21567291/why-does-stdgetline-skip-input-after-a-formatted-extraction). — molbdnilo, Feb 09 '21 at 11:50

score 0 · Answer 1 · answered Feb 09 '21 at 12:26

0

Try using this:

char input[100];
cin.getline(input, sizeof(input));
string str = input;
cout << str.substr(1) << " " << str.substr(6) << " " << str.substr(9) << " " << 
str.substr(15) << "\n";

answered Feb 09 '21 at 12:26

Prasang

11
4

While using string function in C++ getting terminated by using substr() function

1 Answers1