Calculator Challenge

MerickOWA · Post by **MerickOWA** » Tue Aug 19, 2008 10:40 pm

Are we suppose to implement a unary negatate operator "-" or just the binary form?

Edit: and i'm assuming we dont need any error handling? like verifying an ending ')' or such stuff?
Edit2: do we have to handle empty string without error?

Post by **adum** » Tue Aug 19, 2008 11:51 pm

oh, it's a friendly challenge! =)

no unary negative.

no negative tests: all input will be well formed and non-empty.

adum

MerickOWA · Post by **MerickOWA** » Thu Aug 21, 2008 3:52 pm

adum wrote:oh, it's a friendly challenge! =)

no unary negative.

no negative tests: all input will be well formed and non-empty.

adum

Might make a note on the challenge that multi digit numbers has to be handled

lechat · Post by **lechat** » Thu Aug 28, 2008 12:06 pm

Do we have multi digit numbers?

MerickOWA · Post by **MerickOWA** » Thu Aug 28, 2008 3:07 pm

lechat wrote:Do we have multi digit numbers?

We dont have the ability in hvm language to enter multidigit numbers no... but we still have to be able to support it in the calculator challenge. Example: "10+5" must print out 15 not 5 or 6

Tenebrar · Post by **Tenebrar** » Tue Sep 02, 2008 2:08 pm

Are the strings null-terminated?

Also, I assume numbers stored as the integer representing their character values?

("8+5*(1+2)" would be in memory as 56,43,53,42,40,49,43,50,41,0)

lechat · Post by **lechat** » Tue Sep 02, 2008 4:34 pm

What you wrote is exactly how it is represented.

micha · Post by **micha** » Wed Feb 04, 2009 1:22 am

MerickOWA wrote:
lechat wrote:Do we have multi digit numbers?
We dont have the ability in hvm language to enter multidigit numbers no... but we still have to be able to support it in the calculator challenge. Example: "10+5" must print out 15 not 5 or 6

oh do we? so may I assume that the representation of 10+5 is "49,48,43,53"?

MerickOWA · Post by **MerickOWA** » Wed Feb 04, 2009 3:26 pm

yep thats how its represented in memory. As lechat noted too, a null (zero) terminator denotes the end of the string.

cyberwoozle · Post by **cyberwoozle** » Fri Apr 17, 2009 9:25 pm

Do we have to expect nested parentheses like (3-(7+6))*5 ?

teebee · Post by **teebee** » Sun Apr 19, 2009 5:48 pm

I entered as solution

Code: Select all

0<p

and got

Expected: '2', got: '49' for input '10/(2+3)'
Expected: '145', got: '49' for input '1*27+(23-26+18-6)*10+(13+15)'
Expected: '-368', got: '49' for input '16*3-22+8*12-27*18-4'
Expected: '470', got: '40' for input '(7+15+15-20+15+2*(19-16+14)*24-27*14)'
Expected: '-38104', got: '50' for input '22-15*4-5-10*28*17*8+12+1*7'
Expected: '303', got: '49' for input '11-2-8-13+25+2-((11-19)*3)*12'
'0<p' is incorrect.

As you can see nested parentheses occur in some test cases. So, be prepared for them.

cyberwoozle · Post by **cyberwoozle** » Sun Apr 19, 2009 7:40 pm

Hmmm, i could have tried this myself ...

Thanks anyway!