Computer Science Canada

ARRAYS

Author:	Neo [ Wed Nov 24, 2004 11:08 pm ]
Post subject:	ARRAYS
If I had an array with 121 variables of boolean, how would I check to see if all of them are true? like this but shortened if num(1)=true and num(2)=true and num(3)=true...etc

Author:	wtd [ Wed Nov 24, 2004 11:11 pm ]
Post subject:	Re: ARRAYS
Neo wrote: If I had an array with 121 variables of boolean, how would I check to see if all of them are true? like this but shortened if num(1)=true and num(2)=true and num(3)=true...etc Use a loop. Remember that checking to see if they're all true is the same as checking to see if any of them are false.

Author:

Hikaru79 [ Wed Nov 24, 2004 11:47 pm ]

Post subject:

code:

var allTrue : boolean := true
for x: 1..121
if num(x) = false then
allTrue := false
exit
end if
end for

Author:

wtd [ Thu Nov 25, 2004 12:02 am ]

Post subject:

Hikaru79 wrote:

code:

var allTrue : boolean := true
for x: 1..121
if num(x) = false then
allTrue := false
exit
end if
end for

Close, but you don't need the variable. And as long as you posted code...

code:

function allTrue (arr : array 1 .. * of boolean) : boolean
for i : 1 .. upper (arr)
if not arr (i) then
result false
end if
end for
result true
end allTrue

Author:

Hikaru79 [ Thu Nov 25, 2004 12:09 am ]

Post subject:

wtd wrote:

Hikaru79 wrote:

code:

var allTrue : boolean := true
for x: 1..121
if num(x) = false then
allTrue := false
exit
end if
end for

Close, but you don't need the variable. And as long as you posted code...

code:

function allTrue (arr : array 1 .. * of boolean) : boolean
for i : 1 .. upper (arr)
if not arr (i) then
result false
end if
end for
result true
end allTrue

I stand corrected.

Author:	wtd [ Thu Nov 25, 2004 12:29 am ]
Post subject:
You had the basic idea down fine. You just weren't taking full advantage of "result".

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