diff --git a/slocc.c b/slocc.c
index 3037ded..d456a3b 100644
--- a/slocc.c
+++ b/slocc.c
@@ -1,48 +1,47 @@
 #include <stdio.h>
+#include <string.h>
 
 int main(int argc, char *argv[]) {
   if (argc != 2) {
-    printf("Usage: %s [file.c]\n", argv[0]);
+    fprintf(stderr, "Usage: %s [file.c]\n", argv[0]);
     return 1;
   }
 
   FILE *file = fopen(argv[1], "r");
   if (!file) {
-    printf("Error opening file\n");
+    fprintf(stderr, "Error: cannot open file\n");
     return 1;
   }
 
-  char line[1024];
-  int sloc = 0;
-  int in_multiline = 0;
+  char line[BUFSIZ];
+  int sloc = 0, multi = 0;
 
-  while (fgets(line, sizeof(line), file)) {
+  while (fgets(line, sizeof line, file)) {
     char *p = line;
     int has_code = 0;
 
     while (*p) {
-      if (in_multiline) {
+      if (multi) {
         if (p[0] == '*' && p[1] == '/') {
-          in_multiline = 0;
+          multi = 0;
           p += 2;
           continue;
         }
       } else {
         if (p[0] == '/' && p[1] == '*') {
-          in_multiline = 1;
+          multi = 1;
           p += 2;
           continue;
         }
         if (p[0] == '/' && p[1] == '/')
           break;
-        if (p[0] != ' ' && p[0] != '\t' && p[0] != '\n' && p[0] != '\r') {
+        if (!strchr(" \t\n\r", *p))
           has_code = 1;
-        }
       }
       p++;
     }
 
-    if (has_code && !in_multiline)
+    if (has_code && !multi)
       sloc++;
   }