Why does printf print wrong values?

Question

Why do I get the wrong values when I print an int using printf(\"%f\\n\", myNumber)?

I don\'t understand why it prints fine with %d

Answer 1

the problem is... inside printf. the following happens

if ("%f") {
 float *p = (float*) &a;
 output *p;  //err because binary representation is different for float and int
}