From bc1eb2d886b08d9ee1b2ab3a40987ba214fe1b42 Mon Sep 17 00:00:00 2001
From: Mykola Syniavskyi <mykola.syniavskyi@student.tuke.sk>
Date: Fri, 17 Oct 2025 00:48:44 +0000
Subject: [PATCH] Aktualizovat du3/program.c

---
 du3/program.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/du3/program.c b/du3/program.c
index 26bd05f..b21146a 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -45,20 +45,23 @@ int main() {
     char operator;
     float new, a, b, result;
     init_stack(&mystack);  //обнуляємо стек
+float chyslo;
+char symbol;
+
+    init_stack(&mystack);  //обнуляємо стек
 
     while (fgets(buffer, BUFFER_SIZE, stdin)) {
         buffer[strcspn(buffer, "\n")] = '\0';
         if (strlen(buffer) == 0) {
             printf("no input\n");
-            return 0;
+            return 1;
         }
-
-        if (sscanf(buffer, "%f", &new) == 1) {  //спроба прочитати число
-            if (!push_stack(&mystack, new)) return 1;
-            print_stack(&mystack);
-        }else if (sscanf(buffer, " %c", &operator) == 1 && strchr("+-*/", operator)) {
-            if (!pop_stack(&mystack, &b) || !pop_stack(&mystack, &a)) return 1;
-
+if (sscanf(buffer, " %f %c", &chyslo, &symbol) == 1) {  //спроба прочитати число але без символів
+    new = chyslo;
+    if (!push_stack(&mystack, new)) return 0;
+    print_stack(&mystack);
+} else if (sscanf(buffer, " %c %c", &operator, &symbol) == 1 && strchr("+-*/", operator)) {
+    if (!pop_stack(&mystack, &b) || !pop_stack(&mystack, &a)) return 0;
             switch (operator) {
                 case '+': result=a+b; break;
                 case '-': result=a-b; break;
@@ -77,10 +80,11 @@ int main() {
             }
             print_stack(&mystack);
         } else {
-            printf("bad input\n");
-            return 0;
+            printf("invalid input\n");
+            return 1;
         }
     }
     printf("no input\n");
     return 0;
+
 }
\ No newline at end of file