diff --git a/du3/program.c b/du3/program.c
index 2952984..4cadb90 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -8,7 +8,7 @@
 
 //kontrola, ze ci vycitane informacie su aritmeticky spravne
 //VRACIA: int: -1 (CHYBA), 0 (False), (True)
-int IsArithCorrect(float num1, float num2, char* op, float result)
+float IsArithCorrect(float num1, float num2, char* op, float result)
 {
 
     switch (*op)
@@ -55,7 +55,9 @@ int main()
             num1Temp[0] = '\0';
             num2Temp[0] = '\0';
             resultTemp[0] = '\0';
-            int writeIntoArrayNum = 1; // kontrolna premena na urcovanie toho, kde sa ma zapisovat obsah (1 == num1, 2 = num2, 3 = vysledok)
+            
+            bool hasOper = false;
+            bool hasEqualsSign = false;
 
             char op1 = 'N';  //N = 'None/NIC'