Write a program in scheme that can change a mixed simple list according to the following formula
computer science
Description
Question
1: Use the following grammar to answer related questions:
cf à head st
end | head st
head à repeat |
while (cond) | if (cond) | for(assign; cond; assign) | else st
end à
until(cond) | do | endfor | endif | end
st à cf |
expr | st st | assign
expr à var +
expr | var – expr | var * expr | var /expr | var | (expr)
assign
à var =
expr; | var = expr
var à a |b |c
|d…x|z| varvar| const
const
à - ∞ …-1|0|1…∞ (all
numbers)
cond à expr rop
expr | cond rop cond | (cond) | rop (cond)
rop à > |
< | = | != | AND | OR | NOT
Have a
left-most derivation and show a parse-tree for the
following statement (5 Marks)
while (x
< y)
x = b+xy;
else
y = m + (a9/10)
do
Question 2: Write a program in scheme that can
change a mixed simple list according to the following formula. (5 Marks)
·
Replace any number
to hexadecimal
·
Replace any small
letter to caps and vice versa
·
If the number of
element is equal to L, then show half of the list else show the complete
list.
Question 3: For the above problem write a program using an imperative or object
oriented language except C/C++ and Java (5
Marks)
