Small cleanup

1 files changed, 5 insertions, 7 deletions

diff --git a/2023/04/4b.c b/2023/04/4b.c
index c122f8b..4529ff7 100644
--- a/2023/04/4b.c
+++ b/2023/04/4b.c
@@ -1,11 +1,9 @@
-#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 main() {
         char *buf, line[N];
@@ -19,15 +17,15 @@ int main() {
                 while (*buf != ':') buf++;
                 while (*buf != '|') {
                         buf++;
-                        if (!isnum(*buf)) continue;
+                        if (!ISNUM(*buf)) continue;
                         w[nw++] = atoi(buf);
-                        while (isnum(*buf)) buf++;
+                        while (ISNUM(*buf)) buf++;
                 }
                 while (*buf != '\n') {
                         buf++;
-                        if (!isnum(*buf)) continue;
+                        if (!ISNUM(*buf)) continue;
                         r[nr++] = atoi(buf);
-                        while (isnum(*buf)) buf++;
+                        while (ISNUM(*buf)) buf++;
                 }
                 for (x = 0, i = 0; i < nr; i++) {
                         for (j = 0; j < nw; j++) {