How to Read a Complete Line of User Input Using getline() in C ?

Reading a Complete Line with getline() for File Writing

In C , reading a complete line of user input can be challenging. This article addresses the issue of reading multiple words from a line using the "cin" function.

We have an existing code that prompts the user for a line of text and writes it to a file. However, the code currently reads only one word at a time. To resolve this, we need to use the "getline()" function instead of "cin".

The corrected code should look like this:

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <fstream>

using namespace std;

int main()
{
    char x;

    cout << "Would you like to write to a file?" << endl;
    cin >> x;
    if (x == 'y' || x == 'Y')
    {
        string response;  // Changed data type to string
        cout << "What would you like to write?" << endl;
        getline(cin, response);  // Using getline() now

        ofstream file;
        file.open("Characters.txt");
        file << strlen(response) << " Characters." << endl;
        file << endl;
        file << response;

        file.close();

        cout << "Done. \a" << endl;
    }
    else
    {
        cout << "K, Bye." << endl;
    }

    return 0;
}

The essential change here is the use of "getline(cin, response)" instead of "cin >> y". "getline()" reads a line of text, including spaces, making it suitable for our purpose.

The above is the detailed content of How to Read a Complete Line of User Input Using getline() in C ?. For more information, please follow other related articles on the PHP Chinese website!