1 files changed, 5 insertions, 11 deletions

diff --git a/2023/03/3b.c b/2023/03/3b.c
index 27b5b7c..9bf4c27 100644
--- a/2023/03/3b.c
+++ b/2023/03/3b.c
@@ -1,22 +1,16 @@
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #define N 1000
-
-bool isnum(char c) { return c >= '0' && c <= '9'; }
+#define ISNUM(c) (c >= '0' && c <= '9')
 
 int grab(char *buf) {
-        int x;
-
-        if (!isnum(*buf))
-                return 0;
-
-        while (isnum(*buf)) buf--;
+        if (!ISNUM(*buf)) return 0;
+        while (ISNUM(*buf)) buf--;
         buf++;
-        x = atoi(buf);
-        while (isnum(*buf)) *buf++ = '.';
+        int x = atoi(buf);
+        while (ISNUM(*buf)) *buf++ = '.';
 
         return x;
 }