Move io function into own module.

02/alphabet.c

@@ -23,7 +23,7 @@
 #include <stdio.h>
 #include <ctype.h>
 
-unsigned char getSingleChar();
+#include "myio.h"
 
 
 int main()
@@ -48,13 +48,3 @@ int main()
 
     return 0;
 }
-
-unsigned char getSingleChar()
-{
-    unsigned char result = 'a';
-
-    result = getchar();
-    while(result != '\n' && getchar() != '\n') {}
-
-    return result;
-}

02/myio.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+#include "myio.h"
+
+unsigned char getSingleChar()
+{
+    unsigned char result = 'a';
+
+    result = getchar();
+    while(result != '\n' && getchar() != '\n') {}
+
+    return result;
+}

02/myio.h

@@ -0,0 +1,6 @@
+#ifndef MYIO_H
+#define MYIO_H
+
+unsigned char getSingleChar();
+
+#endif