How to make ignore function remove the delimiter as well - c++

Question

I wanted to grab a 10 character and store it in cstring and ignore the rest but I have having problem with it. The program doesn't halt for input the next time. How can I make it so that it halts and lets me enter again.
#include <cstring>
#include <iostream>
using namespace std;
int main()
{
char arr[11] = " "; //This is a cstring
string x; //will test with this variable
cout <<"Enter 10 character, rest will be ignored: \n";
cin.getline(arr, 10,'\n');
cin.ignore();
cout <<"Testing..\n";
cin >>x; //Should make the program halt
cout <<arr <<endl;
cout <<x;
}

Answer 1

cin.getline(arr, 10,'\n') will output at most 9 characters, not 10 characters, stopping if a line break is read before reaching 9 characters. If you want to receive 10 characters, you need to set the count parameter to 11 - the full size of arr - to include room for 10 characters + the null terminator.
Calling cin.ignore() afterwards without any parameters will ignore only 1 character. So, if the user types in more than count+1 characters, you are not ignoring them all. You should tell cin.ignore() to ignore all characters up to the next line break, if no line break was reached during the read.
Try this instead:
#include <iostream>
#include <string>
#include <limits>
using namespace std;
int main()
{
char arr[11]; //This is a cstring
string x; //will test with this variable
cout << "Enter 10 character, rest will be ignored: \n";
if (cin.getline(arr, 11, '\n'))
{
// <= 10 characters w/ line break were read
}
else
{
if (cin.fail() && !cin.bad()) // exactly 10 characters w/o a line break were read, ignore the rest...
{
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
}
}
cout << "Testing..\n";
cin >> x; //Should make the program halt
cout << arr << endl;
cout << x;
}
That being said, this is C++, not C. It would be easier to use std::getline() instead, eg:
#include <iostream>
#include <string>
using namespace std;
int main()
{
string str; //This is a c++ string
string x; //will test with this variable
cout << "Enter 10 character, rest will be ignored: \n";
getline(cin, str);
if (str.size() > 10)
str.resize(10);
cout << "Testing..\n";
cin >> x; //Should make the program halt
cout << str << endl;
cout << x;
}