c - i want to getchar twice but i cant

Question

int main()
{
    int r, c;
    r = getchar();
    c = getchar();
    putchar(r);
    putchar(c);
    printf("
");
    return(0);
}

After it reads in r, the program outputs r and quits. I want it to ask for c and input it but how come it doesnt do that?

Answer 1

Are you entering the characters on the same line, or on 2 lines?

getchar() will wait until you press enter, and then start parsing the characters. If you have entered 2 characters on 2 different lines, it will read the first character and then the character.

What I mean is, the following input:

a
b

is equivalent to "a b".

getchar() will grab the instead of b, and print a .

You want to type both characters, and only then hit enter.