编译器概念问题 [英] Compiler Concepts Problem

问题描述

为什么编译器不允许创建以整数或仅以整数开头的变量名.例如:为什么不可能，


int 9abc = 46;

或

int 9 = 10;


请帮助

why does compiler does not allows to create a variable name starting with integer or integer only. For example: why is it not possible,


int 9abc=46;

or

int 9=10;


please help

推荐答案

，因为要区分用作名称的数字和仅是数字的数字更加困难.它在很大程度上是历史性的，但规则是规则.还有上面您建议的表达式:

Because it is more difficult to distinguish between a number that is used as a name and a number that is just a number. It''s largely historical, but the rules are the rules. And an expression such as you suggest above:

int 9=10;

只是愚蠢.

is just plain stupid.

简单的答案是因为它违反了C语言规范"

原因很简单:它消除了混乱.如果您确实允许变量以数字开头怎么办?

The simple answer is "Because it is against the C language specification"

The reason why is pretty simple: it removes confusion. What if you did allow variables to start with numbers?

number = 1E6;

这是指1000000吗?还是尚未定义的名为"1E6"的变量?

Does this refer to 1000000? Or a variable called "1E6" that hasn''t been defined yet?

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