CODEWITHSUNDEEP
ccharacternewlinestdingetchar
lev.1 code
lev.1 code

Reputation: 87

Putting an enter key when getchar(); is executed

int main()
{
    int a;
    a = getchar();
    printf("%d", a);
}

output

10

This is When I wrote code like this and stroked only an 'enter' key on console. Keystroke 'enter' effect 1. put a '\n' in buffer 2. return that value to getchar sequently(It's what I am understanding about the situation). How can it possible? This result is like pressing enter key twice. I found a related question getchar, but I couldn't find something to help me understand.

Upvotes: 0

Views: 1159

Answers (1)

RobertS supports Monica Cellio
RobertS supports Monica Cellio

Reputation: 15042

This result is like pressing enter key twice.

It is the behavior of getchar(), when it encounters a newline character \n only in stdin, what makes the difference. 

int main()
{
    int a;
    a = getchar();
    printf("%d", a);
}

shows the appropriate output of:

10

when you input one "Enter" keystroke.

getchar() waits for input until it encounters a newline \n in stdin then returns the character values until that moment; If \n was the only character encountered, getchar() stops scanning and returns this newline character and actually this is what was happen.

In this particular case, You do not need to push "Enter" a second time to affect that getchar() stops scanning.

Upvotes: 2

Related Questions