在 C# 中将字节转换为布尔值

Question

I'm trying make a library to iot core on c# based on arduino library ( http://blog.electrodragon.com/rc522-write-a-card-demo-code/ ) but i don't understand what is:

if (!(temp & 0x03))

or

while ((i!=0) && !(n&0x01) && !(n&waitIRq))

It's required boolean values but those are bytes! How i can convert this?

If anyone know a library already made, please let me know. Thank you.

Answer 1

In C any non-zero expression is implicitly true, and zero is false. In C# you need to do an explicit comparison:

if ((temp & 0x03) == 0)

and

while ((i!=0) && (n&0x01)==0 && (n&waitIRq)==0)

Alternatively, you can use the .NET's Boolean structure :

bool isTempAppropriate = (temp & 0x03) == 0;
if(isTempAppropriate) { ... }

Note that bool is just syntactic sugar for System.Boolean , and that you could have used the var keyword instead of bool .