Implemented Evaluation

MathPad/MPFunction.m

@@ -82,9 +82,9 @@
 }
 
 #pragma mark Evaluating Functions
-- (double)evaluateFunction:(NSError *__autoreleasing *)error
+- (NSDecimalNumber *)evaluate:(MPParseError *__autoreleasing *)error
 {
-    return 0;
+    return [NSDecimalNumber zero];
 }
 
 #pragma mark Notifications
@@ -182,24 +182,4 @@
     return 1;
 }
 
-- (float)floatValue
-{
-    return (float)[self doubleValue];
-}
-
-- (int)intValue
-{
-    return (int)[self doubleValue];
-}
-
-- (NSInteger)integerValue
-{
-    return (NSInteger)[self doubleValue];
-}
-
-- (long long)longLongValue
-{
-    return (long long)[self doubleValue];
-}
-
 @end