the function in_avail()

[berkay]

#include <iostream>
using namespace std;
int main () {
streamsize size;
char ch;
streambuf * pbuf;
pbuf = cin.rdbuf();
cout << "Please enter some characters: ";
cin >> ch;
size = pbuf->in_avail();

cout << "The first character you entered is: " << ch << endl;
cout << size << " additional characters in input buffer" << endl;
return 0;
}

i enter ball;the output is:
The first character you entered is:b
4 additional characters in input buffer.

i think it must print 3 add.chars

 

[Jack Klein]

#include <iostream>
using namespace std;
int main () {
streamsize size;
char ch;
streambuf * pbuf;
pbuf = cin.rdbuf();
cout << "Please enter some characters: ";
cin >> ch;
size = pbuf->in_avail();

cout << "The first character you entered is: " << ch << endl;
cout << size << " additional characters in input buffer" << endl;
return 0;
}

i enter ball;the output is:
The first character you entered is:b
4 additional characters in input buffer.

i think it must print 3 add.chars

Did you enter "ball" by pressing 'b', 'a', 'l', 'l' and the "Enter" or
"Return" key on your keyboard? Don't you think that the '\n'
generated by that final key counts as one character?