Add fib example

examples/fib/fib.mc

@@ -0,0 +1,28 @@
+int fib(int n)
+{
+	if (n < 2) {
+		return n;
+	}
+
+	return fib(n - 1) + fib(n - 2);
+}
+
+int main()
+{
+	print("Please enter a number: ");
+
+	int n;
+	n = read_int();
+	print_nl();
+
+	int result;
+	result = fib(n);
+
+	print("fib(");
+	print_int(n);
+	print(") = ");
+	print_int(result);
+	print_nl();
+
+	return 0;
+}

examples/fib/fib.stdin.txt

@@ -0,0 +1 @@
+11

examples/fib/fib.stdout.txt

@@ -0,0 +1,2 @@
+Please enter a number: 
+fib(11) = 89