You are permitted, and encouraged, to work together on these problems,
provided that every contributor understands how the complete solution
was found. Put the names of all contributors into comments at the top of
the solution:

   /* assignment 1 */
   /* Joe Bloggs */
   /* Alice Smith */

Your solutions are due Friday 31 August at 17:00. Send each solution in
a separate email message to djb-275-hw@cr.yp.to.


1. Write a biglittle() function so that after

   int x; int y; int big; int little;

the code

   biglittle(x,y,&big,&little);

has the same effect as

   if (x < y) { big=y; little=x; }
   else { big=x; little=y; }


2. Write a sincos() function so that after

   double s; double c; double theta;

the code

   sincos(&s,&c,theta);

has the same effect as

   s = sin(theta); c = cos(theta);