C compiler bug (floating point arithmetic)?

Question

#include

int main()
{
    double fract=0;
    int tmp;

    //scanf(\"%lf\",&fract);
    fract=0.312;
    printf(\"%lf\",fract);
    printf(\"\\n         


        

Answer 1

So you multiplied 0.3119999999999999999895916591441391574335284531116485595703125 by 1000 and truncated it and got 311? I don't see where the problem is.