before main

after main

anywhere, but starting on a new line

none of the above

int < unsigned < float < double

unsigned < int < float < double

int < unsigned < double < float

unsigned < inc < double < float

y=(int)(x+0.5)

y=int(x+0.5)

y=(int)x+0.5

y=(int)(int)x+0.5)

A float

A double

A long double

Depend upon memory model that you are using

printf("%f%f",a,b);

printf("%Lf%f",a,b);

printf("%Lf%Lf",a,b);

printf("%f%Lf",a,b);