C++ File Input/Output Open Character Question

Asked 2 weeks ago, Updated 2 weeks ago, 2 views

The getline() function also receives open characters, but when I execute the code, it just comes out connected I don't know why In test.txt, test1 test2 test3 It's in here

#include<iostream>
#include<fstream>
#include<string>
using namespace std;
int main()
{
    ifstream file;
    file.open("test.txt");
    if (file.is_open())
    {
        while (!file.eof())
        {
            string arr;
            getline(file, arr);
            cout << arr;
        }
    }
    return 0;
}

The output is test1test2test3

fileinputstream

2022-09-20 11:04

1 Answers

The getline function does not accept open characters.

Instead, the getline function is used to receive a line containing a space (such as a blank or tap character).

In the case of sin, you do not receive a string containing a space, so you use it.

cout << arr;

The code above should be changed as below.

cout << arr << '\n';

Please also refer to the coding style below.

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

int main()
{
    ifstream ifs("test.txt");

    if (ifs.is_open()) {
        string line;

        while (getline(ifs, line))
            cout << line << '\n';
    }
}


2022-09-20 11:04

If you have any answers or tips


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