const变量和const类型变量的区别 [英] Difference between const variable and const type variable

问题描述

以下两者之间的区别：

const variable = 10;

和

const int variable = 10;

当没有定义类型时，标准中的变量是否被解释为一个整数类型？

解决方案

const variable = 10 是无效的C ++，而 const int variable = 10; 是。 b
$ b

只有当你有一个类型 const variable = 10 c $ c> variable ，并且你有一个函数，该类型的未命名参数，采用默认参数：

  typedef int variable; 
 void foo（const variable = 10）; 
  

What is the difference between:

const variable = 10;

and

const int variable = 10;

Does variable, per the standard, get interpreted as an integral type when no type is defined?

解决方案

const variable = 10 is not valid C++, while const int variable = 10; is.

The only time (that I can think of) that const variable = 10 would be valid is if you had a type named variable and you had a function with an unnamed parameter of that type, taking a default argument:

typedef int variable;
void foo(const variable = 10);

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