Simple types and strings (2) P16327

You have to program several functions. In each case, few lines of code are enough. Warning: do not use the split string method.

1. Write a function @um_count(s)@ that given an string $s$ returns the number of times character u is followed by character m in string $s$.

2. Write an integer function @word_count(s)@ that returns the number of words in string $s$. We assume all characters of $s$ are letters and spaces.

3. Write a function @kth_word(s, k)@ that given a string $s$ and an integer $k\ge 1$ returns the $k{\it th}$ word in string $s$. If $s$ has less than $k$ words it returns the empty string. We assume all characters of $s$ are letters and spaces.

4. Write a function @suc_word(s)@ that given a string $s$ and returns the first word in string $s$ that has some uppercase letter. If all the letters in $s$ are lowercase it returns the empty string. We assume all characters of $s$ are letters and spaces.

5. Write a function @drawA(n)@ that given an odd integer $n\ge 3$ prints a letter A of size $n$ formed with symbol .

Scoring

Every function counts 20 points.

Sample session