subtraction with borrow

How to write a pragram to subtraction immediate data from accumulator with borrow in C51?

In C51 you don't.

If you want to fiddle with the accumulator and the carry flag, C is not, repeat: not the language to do it in. If you want to program assembler, do it in assembler.

How to write a pragram to subtraction immediate data from accumulator with borrow in C51?

In C51 you don't.

If you want to fiddle with the accumulator and the carry flag, C is not, repeat: not the language to do it in. If you want to program assembler, do it in assembler.