Reading from txt files and making it strings.

[StillAlive039]

Example if I have a Sample.txt and it contains.

Hello
Hi

How could i choose Hi and put it in a String Variable?

[JLBorges]

#include <iostream>
#include <fstream>
#include <string>

int main()
{
    const char* const path = "example.txt" ;
    {
        // create a test file containing two lines
        std::ofstream(path) << "Die schärfsten Kritiker der Elche\n"
                               "waren früher selber welche\n" ;
    }

    {
        // read (whitespace delimited) token by token
        std::ifstream file(path) ;
        std::string token ;

        // http://www.cplusplus.com/reference/string/string/operator%3E%3E/
        while( file >> token ) std::cout << token << '\n' ;
    }

    std::cout << "-----------------\n" ;

    {
        // read line  by line
        std::ifstream file(path) ;
        std::string line ;

        // http://www.cplusplus.com/reference/string/string/getline/
        while( std::getline( file, line ) ) std::cout << line << '\n' ;
    }
}

http://coliru.stacked-crooked.com/a/1d4f90f773087787

[StillAlive039]

I'm a beginner sorry, I don't seem to understand the getline part for the ifstream. When I code I cannot get my text file contain and place it in a String Variable.

There are two words in the text file:

Hi
Hello

I would like to put Hi in Username. How? (Sorry I'm a noob here)

	string loadfile, username, password, Username, Password;
	cout << "Please put account name: " << endl;
	cin >> loadfile;
	cout << endl;
	
	ifstream accntNme(loadfile.c_str());
	
	if (accntNme.is_open())
	{
		username = Username;
		password = password;
		cout << "Username: " << endl;
		cin >> Username;
		cout << "Password: " << endl;
		cin >> Password;
		
		if (username == Username && password == Password)
		{
			cout << "Welcome " << Username << "!" << endl;
		}
		
		else
		{
			cout << "Wrong Username/Password." << endl;
		}
	}

[anup30]

input.txt :

abc 4d3
zxc

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

int main(){
	string s;
	ifstream in("input.txt");

	in >> s;	
	cout << "s = " << s << endl;

	in >> s;	
	cout << "s = " << s << endl;
	
return 0;
}

output:

s = abc
s = 4d3

[JLBorges]

#include <iostream>
#include <fstream>
#include <string>

int main()
{
    // read username and password entered by the user
    std::string user_name ;
    std::cout << "user name? " ;
    std::cin >> user_name ;

    std::string password ;
    std::cout << "password? " ;
    std::cin >> password ;

    const char* const path_to_password_file = "pword.txt" ;
    std::ifstream file(path_to_password_file) ; // open the file for input

    std::string user_name_in_file ;
    std::string password_in_file ;
    file >> user_name_in_file >> password_in_file ; // read username and password in file

    if( user_name == user_name_in_file && password == password_in_file ) // check if they match
    {
        std::cout << "welcome!\n" ;

        // ...
    }

    else
    {
        // login error
    }

}

[StillAlive039]

Thank you guys for the help, I was able to fix it!