功能签名 [英] Function Signatures
问题描述
我创建了一个函数：
void round（double& num）
在同一个类文件中，我还包含了cmath头文件管理器
当我尝试编译时，我得到一个模糊错误。如果我正确地记得
，那么圆形文件是否有签名：
双轮（双）？
所以不会因为我通过引用传递，因此我的情况有所不同，因为
与cmath头文件的传递值相反？或者我是否已经误解了这方面的重载？
I created a function:
void round(double & num)
In the same class file I have also included the cmath header filer
When I try to compile I get an ambiguity error. If I recall
correctly, doesn''t the cmath round file have a signature:
double round(double)?
So would not mine be different since I am passing by reference as
opposed to the pass by value of the cmath header file? Or have I been
misunderstanding this aspect of overloading?
推荐答案
da ***** @ digitalfiling.com 写道：
da*****@digitalfiling.com wrote:
我创建了一个函数：
void round（double& num）
在同一个类文件中我还包含了cmath头文件管理器
当我尝试编译我得到一个歧义错误。如果我正确地记得
，那么圆形文件是否有签名：
双轮（双）？
所以不会因为我通过引用传递，因此我的情况有所不同，因为
与cmath头文件的传递值相反？或者我是否已经误解了这方面的重载？b
$ b
I created a function:
void round(double & num)
In the same class file I have also included the cmath header filer
When I try to compile I get an ambiguity error. If I recall
correctly, doesn''t the cmath round file have a signature:
double round(double)?
So would not mine be different since I am passing by reference as
opposed to the pass by value of the cmath header file? Or have I been
misunderstanding this aspect of overloading?
如果你把b + b给它加倍，你期望编译器确定调用哪个函数？
5月1日上午9:40，Rolf Magnus< ramag ... @ t-online.dewrote：
On May 1, 9:40 am, Rolf Magnus <ramag...@t-online.dewrote:
dani ... @ digitalfiling.com写道：
dani...@digitalfiling.com wrote:
我创建了一个函数：
void round（double& amp ; num）
I created a function:
void round(double & num)
在同一个类文件中我还包含了cmath头文件管理器
当我尝试编译时得到歧义错误。如果我正确地记得
，那么圆形文件是否有签名：
双轮（双）？
所以不会因为我通过引用传递，因此我的情况有所不同，因为
与cmath头文件的传递值相反？或者我是否已经误解了这方面的重载？b
$ b
In the same class file I have also included the cmath header filer
When I try to compile I get an ambiguity error. If I recall
correctly, doesn''t the cmath round file have a signature:
double round(double)?
So would not mine be different since I am passing by reference as
opposed to the pass by value of the cmath header file? Or have I been
misunderstanding this aspect of overloading?
如果你想要编译器确定调用哪个函数
给它一个加倍？
How do you expect the compiler to determine which function to call if you
give it a double?
我的问题是，编译器是否考虑通过引用传递
与确定签名时的传递值不同？
My questions is, "Does the compiler not consider passing by reference
different from passing by value when determining a signature?"
2007年5月1日星期二07:36:42 -0700，daniell写道：
On Tue, 01 May 2007 07:36:42 -0700, daniell wrote:
我创建了一个函数：
void round（double& num）
在同一个类文件中我还包含了cmath头文件管理器当
我尝试编译我得到歧义错误。如果我没记错的话，
这个圆形文件没有签名：
双轮（双）？
所以不会因为我通过引用传递，因此我的情况有所不同，因为
与cmath头文件的传递值相反？或者我是否已经误解了这方面的重载？b
$ b
I created a function:
void round(double & num)
In the same class file I have also included the cmath header filer When
I try to compile I get an ambiguity error. If I recall correctly,
doesn''t the cmath round file have a signature:
double round(double)?
So would not mine be different since I am passing by reference as
opposed to the pass by value of the cmath header file? Or have I been
misunderstanding this aspect of overloading?
但是当你打电话给你的函数时，请说：
double x = 3.27;
round（x）;
编译器怎么知道你想要哪一轮（）？
最简单的方法是将你的函数放在一个命名空间，或简单地给它
a不同的名字。
-
Lionel B
But when you call your function, say:
double x = 3.27;
round(x);
how could the compiler know which round() you intended?
Easiest would be to place your function in a namespace, or simply give it
a different name.
--
Lionel B
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