Add the fizzbuzz question

Clear up text in the second chapter

ex-basics/ex-fizzbuzz.tex

@@ -0,0 +1,17 @@
+\begin{Exercise}[title={FizzBuzz},difficulty=1]
+\label{ex:fizzbuzz}
+\Question \label{ex:fizzbuzz q1} Solve this simple problem called
+the Fizz-Buzz \cite{fizzbuzz} problem:
+\begin{quote}
+Write a program that prints the numbers from 1 to 100. But for multiples
+of three print "Fizz" instead of the number and for the multiples of
+five print "Buzz". For numbers which are multiples of both three and
+five print "FizzBuzz".
+\end{quote}
+\end{Exercise}
+
+\begin{Answer}
+\Question The hard part was probably writing the thing in Go. A possible
+solution to this simple problem is the following program.
+\lstinputlisting[label=src:fizzbuzz,caption=Fizz-Buzz]{ex-basics/src/fizzbuzz.go}
+\end{Answer}

ex-basics/src/fizzbuzz.go

@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+func main() {
+	fizz := 3
+	buzz := 5
+	for i := 1; i < 100; i++ {
+		if i%fizz == 0 {
+			fmt.Printf("Fizz")
+		} else if i%buzz == 0 {
+			fmt.Printf("FizzBuzz")
+		} else {
+			fmt.Printf("%v", i)
+		}
+		fmt.Println()
+
+	}
+}

go-basics.tex

@@ -585,6 +585,8 @@ \subsection{Maps}
 \section{Exercises}
 \input{ex-basics/ex-for.tex}
 
+\input{ex-basics/ex-fizzbuzz.tex}
+
 \input{ex-basics/ex-strings.tex}
 
 \cleardoublepage

go.bib

@@ -153,3 +153,10 @@ @misc{iota
     howpublished = {Internet,
 	\url{http://en.wikipedia.org/wiki/Iota}}
 }
+
+@misc{fizzbuzz,
+    author = "Imran On Tech",
+    title = "Using FizzBuzz to Find Developers who Grok Coding",
+    howpublished = {Internet,
+	\url{http://imranontech.com/2007/01/24/using-fizzbuzz-to-find-developers-who-grok-coding/}}
+}