Bypassing enter

[chanu]

My doubt is how to read a string in next line followed by an integer like as follows

8
111111110001

we have to read from keyboard 8 as integer and then after pressing enter we have to read 111111110001 as a string .

Below is my code , when i gave input as 8 111111110001 (separated by space) , it works properly but when i press enter , program is not reading string.

Thanks in advance .

#include <iostream>
#include <string>

using namespace std;

int main()
{
    int n;
    string s;
    cin >> n;
    getline(cin,s);
    return 1;
}

[xenovia12]

because you only cin the n you should cin also the string s like this cin>>n>>s

[xenovia12]

also i think youre confusing between getline and cin
but if you want to do in you way

#include <iostream>
#include <string>

using namespace std;

int main()
{
    int n;
    string s;
    getline(cin,s,'\n');
    cin >> n;


    return 1;
}

[chanu]

Thank you @justin i am following 2nd one :)

[Chervil]

After the user types the integer, the enter key is pressed. All those characters, including the newline character '\n' are stored in the input buffer. After cin >> n that newline still remains in the buffer. We can remove it using cin.ignore().

#include <iostream>
#include <string>

using namespace std;

int main()
{
    int n;
    string s;
    cout << "enter an integer: \n";
    cin >> n;
    
    cin.ignore(1000, '\n'); // remove newline (and any other chars)
                            // from input buffer
    cout << "enter a string: \n";
    getline(cin,s);
    
    cout << "n = " << n << endl;
    cout << "s = " << s << endl;
    
    return 0;
}

@justinelandichoruiz unfortunately you provide a workaround, which merely hides the problem temporarily, rather than a solution.

[xenovia12]

@chervil can i ask you, what is the purpose of 1000 in the param of cin.ignore?

[Chervil]

what is the purpose of 1000 in the param of cin.ignore?

1000 was an arbitrary number I chose. it means, ignore up to 1000 characters from the input stream, or until the delimiter is found, whichever comes first.

See reference:
http://www.cplusplus.com/reference/istream/istream/ignore/

[xenovia12]

okay i think the reference is enough. thank you