How to implement a BOOLEAN ARRAY on C51?

You didn't say which toolset; I'm assuming C51:

NO - you can't have arrays of bits (see "Bit Types" in the manual)

You can, however, have an object in which individual bits can be accessed directly - see "Bit-Addressable Objects" in the manual - although this does not give you indexed access to the bits.

Review this thread, which includes submissions with example code:
http://www.8052.com/forum/read.phtml?id=20996

But, if you don't specifically need an array of bits, just do what conventional 'C' compilers do - an array of bytes, in which each byte value is considered to represent either false (value==0) or true (value!=0)

You didn't say which toolset; I'm assuming C51:

NO - you can't have arrays of bits (see "Bit Types" in the manual)

You can, however, have an object in which individual bits can be accessed directly - see "Bit-Addressable Objects" in the manual - although this does not give you indexed access to the bits.

Review this thread, which includes submissions with example code:
http://www.8052.com/forum/read.phtml?id=20996

But, if you don't specifically need an array of bits, just do what conventional 'C' compilers do - an array of bytes, in which each byte value is considered to represent either false (value==0) or true (value!=0)

"You didn't say which toolset"

I'm sorry - you did say it in the Subject: - but it disappears off the end of the line on the Reply form, so I couldn't see it.

But, in future, it'd help if you selected the appropriate toolset in the Product drop-down list.