如何在C中为整数类型变量赋值？ [英] How can you assign a character value to a integer type variable in C?

问题描述

在C中，

...
int num = 'a';
...

我的问题很简单。如何在整数类型变量中指定诸如0，a，b之类的字符而不会在C语言中出现任何类型错误？

My question is simple. How can you assign a character such as '0', 'a', 'b' to an integer type variable without getting any type error in C language?

推荐答案

由于历史原因（大多数情况下），字符常量在C中的类型为 int 。

For historical reasons (mostly), character constants are of type int in C.

但是，即使它们不是，初始化如

But even if they weren't, an initialization like

int num = 'a';

或像

num = 'a';

仍然完全合法。可以将任何数字类型的值分配给任何（其他）数字类型的变量，并且将隐式转换该值（这可能涉及表示的更改和/或溢出的风险）。

would still be perfectly legal. A value of any numeric type may be assigned to a variable of any (other) numeric type, and the value will be implicitly converted (which may involve a change of representation and/or a risk of overflow).

和 char ，以及它的亲戚 unsigned char 和 signed char ，是数字类型，特别是整数类型。

And char, along with its relatives unsigned char and signed char, are numeric types, specifically integer types.

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