1 files changed, 4 insertions, 1 deletions
diff --git a/4/3.c b/4/3.c
index d5810a9..83a45a9 100644
--- a/4/3.c
+++ b/4/3.c
@@ -98,7 +98,7 @@ int getop(char s[]) {
     ;
   s[1] = 0;
 
-  if (!isdigit(c) && c != '.')
+  if (!isdigit(c) && c != '.' && c != '-')
     return c;
 
   i = 0;
@@ -108,6 +108,9 @@ int getop(char s[]) {
   if (c == '.')
     while (isdigit(s[++i] = c = getch()))
       ;
+  if (c == '-')
+    while (isdigit(s[++i] = c = getch()))
+      ;
   s[i] = 0;
 
   if (c != EOF)