类型（变量）vs（类型）变量[重复](Type(variable) vs (Type)variable [duplicate])

 
 
 可能重复： 
 （类型）值和类型（值）之间有什么区别？ 
 
 
 我主要是一个C＃开发人员，因此使用类似下面的语法进行了大量显式强制转换： (type)variable ，以(int)100.0004d为例。 因此，当用C ++编写代码时，我经常使用相同的语法。 但是，在其他情况下，我已经看到（甚至使用过）代码，其中使用以int(100.0004)为例的语法type(variable)来实现相同的int(100.0004) 。 
 
 我只是好奇两种方法之间的区别是什么，以及在使用这两种方法时是否有任何影响。 
 
 例： 
 
double someDouble = 100.00456;

// Cast the double using the (type)variable syntax
int firstCastValue = (int)someDouble;

// Cast the double using the type(variable) syntax
int secondCastValue = int(someDouble);

 
 
Possible Duplicate:
 What is the difference between (type)value and type(value)? 
 
 
I am mainly a C# developer and so do a lot of explicit casting using syntax like: (type)variable, with (int)100.0004d as an example. As such, when writing code in C++, I often use the same syntax. However, I have seen (and even used) code in other cases where the same cast is achieved using the syntax type(variable) with int(100.0004) as an example.
 
I was just curious as to what the difference between the two methods were and whether there were any implications in using one over the other.
 
Example:
 
double someDouble = 100.00456;

// Cast the double using the (type)variable syntax
int firstCastValue = (int)someDouble;

// Cast the double using the type(variable) syntax
int secondCastValue = int(someDouble);

原文：https://stackoverflow.com/questions/8881178