c++ - cin.getline( ) with larger size

Question

#include<iostream>
using namespace std;

int main()
{
   char test[10];
   char cont[10];

   cin.getline(test,10);
   cin.getline(cont,10);

   cout<<test<<" is not "<<cont<<endl;
    return 0;
}

When I input:

12345678901234567890

output is:

123456789

It seems cont is empty. Could someone explain it?

Answer 1

istream::getline sets the fail bit if the input is too long, and that prevents further input. Change your code to:

#include<iostream>
using namespace std;

int main()
{
   char test[10];
   char cont[10];

   cin.getline(test,10);
   cin.clear();                    // add this
   cin.getline(cont,10);

   cout<<test<<" is not "<<cont<<endl;
    return 0;
}