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1. [20pts] Consider the following code snippet:

   void foo(int a, int& b);
   string bar(double k, string s);
   int i, j, k;
   double x, y, z;
   string u, v, w;
   

   For the functions calls below, circle only the ones that would be OK.

   a. foo(3,4) b. foo(i,j) c. foo(i,j+k) d. foo('a',i) e. foo("a",i) f. bar(3.0,4.0) g. bar(x,u) h. bar(x,u+v) i. bar(a,v) j. bar(x+y,"a")

2. [80pts] Write a recursive function

   void rectangle(int rownum, int colnum, ostream& OUT);
   

   that prints out rectangles of *'s with rownum rows and colnum columns. In the spirit of bottom-up design, I'll provide you with a function you may want to use:

   void rep(char c, int k, ostream& OUT) {
     for( int i = 0; i < k; i++ )
       OUT << c;
   }
   

   Ever seen it before? Anyway, test your function with a program that reads the dimensions of the rectangle and the destination your writing to from the user, something like this:

   How many rows? 3
   How many columns? 2
   (S)creen of (F)ile? S
   
   **
   **
   **
   

   Turn In a printout of your program and a screen capture showing it run on the above example.