Much cleanup to better match lesson text

lcthw/ex1.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+/* This is a comment. */
+int main(int argc, char *argv[])
+{
+	int distance = 100;
+
+	// this is also a comment
+	printf("You are %d miles away.\n", distance);
+
+	return 0;
+}