Sample CMSC 106 MIDTERM Problems

1. Write a recursive function which takes an int and returns its factorial.
2. Write an iterative version of the same function.
3. Which of the following are legal ANSI C identifiers:

          x       a1b2c3     if
   

   Explain why or why not.
4. Find the syntax errors in the following code:

   {
   int i,j=0;
   char c;
   scanf("%c',c);
   if (c='A') printf("Everything's Right!\n");
   if (7>0) printf("No it ain't\n")
     esle printf("See I said so.\n");
   }
   
   

5. What does the following code do:

   int i=0,x[N],r=0;
   while ( i < N )
      {
        if (r == 2*r)
          printf("Never Get Here\n");
        if (r < x[i])
          r = x[i++];
      }
   printf("R is %d\n",r);