定义默认 int 为 unsigned int
如何（如果可以）将默认 int 变量（在特定程序中）设置为 unsigned int？
我的意思是，如果int写入程序中，编译器会将其视为unsigned int。
我的编译器是 gcc 4.6.2
编辑：我无权触摸代码。
How can I (if I can) set the default int variable (in a specific program) to be unsigned int?
I mean that if int is written in the program, the compiler treats it like unsigned int.
My compiler is gcc 4.6.2
EDIT: I am not authorized to touch the code.
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评论（2）
您无法更改
int的默认符号性，因为根据定义它是有符号类型 (§6.2.5/4)。考虑main函数，它必须返回类型int(§5.1.2.2.1/1)，如果您以某种方式更改默认符号，则main将返回unsigned int，这将导致未定义的行为，使您的整个应用程序相对无用。您无法创建宏，因为如果
int扩展为unsigned int，那么如果您在某处声明了unsigned int，您最终会使用unsigned unsigned int，这不是有效类型。You can't change the default signedness of
intbecause it is by definition a signed type (§6.2.5/4). Consider themainfunction which must return typeint(§5.1.2.2.1/1), if you change the default signedness somehow, thenmainwill returnunsigned int, and this will cause undefined behaviour, rendering your entire application relatively useless.You can't create a macro, because if
intexpands tounsigned int, then if you have declaredunsigned intsomewhere, you will end up withunsigned unsigned int, which is not a valid type.超级邪恶
可以工作，但绝对不符合标准，你可能需要让你的编译器不那么严格（这是一件坏事）。
您可以做的其他事情是查找并替换所有出现的
int（没有前面的unsigned），并将其替换为my_typedefed_int并添加Which is符合标准，但涉及更多，并且可能不可能。
A super-evil
could work, but is definitely not Standard compliant and you might need to make your compiler be less strict (which is a bad thing).
Other things you can do is find and replace all occurrences of
int(without a precedingunsigned) and replace those withmy_typedefed_intand add aWhich is Standard compliant but is more involved and might not be possible.