C中文件范围内可变修改的数组 [英] variably modified array at file scope in C

问题描述

我有一些这样的代码:

static int a = 6;
static int b = 3;

static int Hello[a][b] =
{
    { 1,2,3},
    { 1,2,3},
    { 1,2,3},
    { 1,2,3},
    { 1,2,3},
    { 1,2,3}
};

但是当我编译它时，它说错误:

but when I compile it, it says error:

在文件范围内可变修改Hello"

variably modified 'Hello' at file scope

怎么会这样?我该如何解决?

how could this happen? and how could I fix it?

推荐答案

你不能将静态数组的大小作为变量给出

You can not have static array which size is given as a variable

这就是为什么常量应该是 #defined:

That's why constants should be #defined:

#define a 6

这样预处理器会将a替换为6，使其成为有效的声明.

This way preprocessor will replace a with 6, making it valid declaration.

这篇关于C中文件范围内可变修改的数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！