What 's the problem?

Question

//C# code: public static System.UInt16 MAKEWORD(byte a, byte b) { return (ushort)a | ((ushort)b << 8); } when compiling,the error "can not implicitly convert type 'int' to 'ushot'" occur. what's the problem?

gongdehui · Answer

Yesyou are right^_^ Thanks!

bilnaad · Answer

Hi Momer Yes your method does the same thing. But it should be slightly slower because of the typeconversions. I have 1 and you have 3 :)

gongdehui · Answer

Hi! Bart but what I use is this: public static ushort MAKEWORD(byte a byte b) { return (ushort)((ushort)a | ((ushort)b << 8)); } can it do the right thing too?

bilnaad · Answer

Momer I'm sorry. I made a mistake. This is the correct method. public static ushort MAKEWORD(byte a byte b) { return (ushort)(a | (b << 8)); } I tested the function with 2 bytes initialised to 255. byte a = 255; byte b = 255; these two bytes are initialised to their maximum value. So the ushort(WORD) return value should be the maximum value of ushort(WORD) wich is 65535. And MAKEWORD(a b) returned 65535 so it's perfect now :)

bilnaad · Answer

just make the return type of the method an ushort. ushort and UInt16 are the same. maximum values: ushort = 65535 UInt16 = 65535 so just copy this: public static ushort MAKEWORD(byte a byte b) { return (ushort)a | ((ushort)b << 8); } Good luck :)