casting int to double in pow()

[l0ul0u]

I'm fairly new to c so forgive me if this is glaringly obvious answer to this.

val += (unsigned int)(pow(2.0, (double)m));

m is an int loop counter. It is involved in some other equations; basically it would be easier for me to cast it to a double in this one case than change it to a double in the declaration.

val += (unsigned int)(pow(2.0, ((double)m) ));

I've tried using adding more brackets, but I still get the error.

Thanks

[brewbuck]

val += (1 << m);

The above avoids a ridiculous trip into floating-point land just to set the m'th bit.

[Tclausex]

brewbuck's solution is the way to go...

but why even cast m? int is a legal 2nd parameter for pow().