Evaluating a string of simple mathematical expressions [closed]

Answer 1

C#

Number of Characters: 355

I took Noldorin's Answer and modified it, so give Noldorin 99% of the credit for this. Best I could do with the algorithm was using was 408 characters. See Noldorin's Answer for the clearer code version.

Changes made:
Change char comparisons to compare against numbers.
Removed some default declarations and combined same type of declarations.
Re-worked some of the if statments.

float q(string x){float v,n;if(!float.TryParse(x,out v)){x+=';';int t=0,l=0,i=0;char o,s='?',p='+';for(;i

Edit: knocked it down some more, from 361 to 355, by removing one of the return statments.