
24 Servicing
Personal
Computers
One important feature of a high-level language is its syntax; i.e. the accepted rules which
govern the formation of statements. These have to be learnt at the outset if the user is to
produce programs which are syntactically correct and acceptable to the computer. The
computer uses a compiler to translate programs in high-level language into machine-code
instructions. Obviously, such a compiler must be microprocessor-specific. Usually the
compiler is resident in ROM but, on some machines, it must be fed in from tape or disk before
high-level programming can commence.
A complete BASIC program to input two numbers ...