Answer to Quiz 3 Fri 26 Jan 2001

1. Write next to the CountChar the equivalent pointer version.

      Your answer may NOT contain any bracket [ or ]!

int CountChar(char s[], char c)            int CountChar(char *s, char c)

{                                          {

   int i,cnt=0;                               int cnt=0;
                                              char *p;
   for (i=0; s[i]!='\0'; ++i)                 for (p=s; *p !='\0';p++)

      cnt += (s[i] == c);                        cnt += (*p == c);

   return cnt;                                return cnt;

}                                          }

2. The input to

         void FirstChars(int n, char *words[], char init[])

   is an array words of n strings.

   FirstChars fills up init with the first character
   of every string in words.

   Assume init is an array of size > n.
   Write the C code for FirstChars.

   void FirstChars(int n, char *words[], char init[])
   {
      int i;
      for (i=0; i<n; ++i)
        init[i] = words[i][0];
      init[n] = '\0';
   }