From 80992ebe6c12cfd9d0d03df6762c2c0f121e6351 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Tue, 31 Jul 2018 10:46:39 +0000
Subject: Updated structure to use a union.

---
 codeword.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/codeword.c b/codeword.c
index 4080c7f..0a2be5a 100644
--- a/codeword.c
+++ b/codeword.c
@@ -34,8 +34,11 @@ typedef enum
 typedef struct
 {
     CharacterClass type;
-    int number;
-    char letter;
+    union
+    {
+	int number;
+	char letter;
+    } data;
 } Character;
 
 static void PrepLine(char *p)
@@ -66,7 +69,7 @@ static int ContainsLetter(char c, const Character *chars, int no_chars)
 
     for(f=0; f < no_chars; f++)
     {
-    	if (chars[f].type == eLetter && chars[f].letter == c)
+    	if (chars[f].type == eLetter && chars[f].data.letter == c)
 	{
 	    return 1;
 	}
@@ -90,7 +93,7 @@ static int CheckLettersAndLength(const char *buff,
     for(f=0; f < no_chars; f++)
     {
     	if (chars[f].type == eLetter &&
-	    (chars[f].letter != buff[f]))
+	    (chars[f].data.letter != buff[f]))
 	{
 	    return 0;
 	}
@@ -109,7 +112,7 @@ static int CheckNumbers(const char *buff, const Character *chars, int no_chars)
     {
     	if (chars[f].type == eNumber)
 	{
-	    int i = chars[f].number - 1;
+	    int i = chars[f].data.number - 1;
 
 	    if (ContainsLetter(buff[f], chars, no_chars))
 	    {
@@ -169,7 +172,7 @@ int CheckAnagram(const char *buff, const Character *chars, int no_chars)
 	{
 	    if (!used[i] &&
 	    	chars[i].type == eLetter &&
-		chars[i].letter == buff[f])
+		chars[i].data.letter == buff[f])
 	    {
 	    	used[i] = 1;
 		found = 1;
@@ -251,11 +254,10 @@ int main(int argc, char *argv[])
 	if (i < 1 || i > 27)
 	{
 	    chars[f].type = eLetter;
-	    chars[f].letter =
+	    chars[f].data.letter =
 	    	tolower((unsigned char)argv[f + 1 + argc_base][0]);
-	    chars[f].number = 0;
 
-	    if (chars[f].letter == '.')
+	    if (chars[f].data.letter == '.')
 	    {
 	    	chars[f].type = eMissing;
 	    }
@@ -269,8 +271,7 @@ int main(int argc, char *argv[])
 	    }
 
 	    chars[f].type = eNumber;
-	    chars[f].number = i;
-	    chars[f].letter = 0;
+	    chars[f].data.number = i;
 	}
     }
 
-- 
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