9

cv3/program.c

@@ -11,7 +11,7 @@ int stack_top = -1;
 bool is_number(char *string) {
     char *end;
     strtof(string, &end);
-    return end != string && *end == '\n';
+    return end != string && (*end == '\n' || *end == '\0');
 }
 
 bool is_operation(char *string) {
@@ -99,6 +99,9 @@ int main() {
     }
 
     if (stack_top == 0) {
+        if (!first_output) {
+            printf(" ");
+        }
         printf("\n%.2f\n", pop());
     } else {
         printf("\nno input\n");