[Error] declaration of ‘a‘ as array of references

原错误代码简略版：

void isEqualUpper(char& a[2]){
	a[0] = 'a';
}

报错：
[Error] declaration of ‘a’ as array of references
[错误]将“a”声明为引用数组

错误原因：
数组引用错用成引用数组
两者区别详解：
https://blog.csdn.net/m0_51487301/article/details/119673337?spm=1001.2014.3001.5501

解决方法：

void isEqualUpper(char (&a)[2]){
	a[0] = 'a';
}