readln and readf issues

[Jacob Marek via Digitalmars-d]

Hi! so I'm probably being dumb here however I'm having an issue 
getting readf and readln to work properly. It seems to be 
superseding the rest of my code. Allow me to explain. No matter 
where I put the readf/readln function it will get hung up in the 
console waiting for input. An example is below where this occurs 
(only after inputting an int and pressing enter does hello print) 
I am using eclipse with the standard DMD compiler. Any help is 
appreciated!

void main() {
        writeln("hello");
        int q;
        readf(" %s", &q);
}