fixed bugs

src/Expressions/OperatorExpression.fu

@@ -29,17 +29,26 @@ class OperatorExpressionDiv : OperatorExpression {
 }
 
 class OperatorExpressionMod : OperatorExpression {
-    // returns if b>0 then returns a%b else returns a
     internal override double OperatorImplementation(double a, double b) {
-        if(b <= 0)
+        if(a == 0)
+            return b;
+        if(b == 0)
             return a;
         if(a > 0){
-            while(a >= b)
+            if(b > 0)
+                while(a-b >= 0)
                     a -= b;
+            else 
+                while(a+b >= 0)
+                    a += b;
         }
         else {
-            while(a <= b)
+            if(b > 0)
+                while(a+b <= 0)
                     a += b;
+            else 
+                while(a-b <= 0)
+                    a -= b;
         }
         return a;
     }

src/MainClass.fu

@@ -2,14 +2,15 @@ public static class MainClass {
     public static void Main(string[] args){
         #if CS
         native {
-            System.Globalization.CultureInfo.DefaultThreadCurrentCulture =                System.Globalization.CultureInfo.InvariantCulture;
+            System.Globalization.CultureInfo.DefaultThreadCurrentCulture = 
+                System.Globalization.CultureInfo.InvariantCulture;
         }
         #endif
         string() joined = "";
         foreach(string arg in args){
             joined += arg + " ";
         }
-        double rezult = Calculator.Calculate(joined);
+        double result = Calculator.Calculate(joined);
-        Console.WriteLine(rezult);
+        Console.WriteLine(result);
     }
 }