perform operations from strings expersions

Question

How can i perform operation from a string
such like "2+5*4" and display answer as 22.

input:
"20+2*2"
output
24

Answer 1

For C#

https://archive.codeplex.com/?p=flee

https://stackoverflow.com/questions/7443781/how-to-convert-string-formula-to-a-mathematical-formula-in-c-sharp

Answer 2

Sacalivin Obiri , in JS you can use eval() function.

Answer 3

In C, as far as I know, there's no function to do that. You have to write your own.

edit: check this https://stackoverflow.com/questions/1151127/evaluating-mathematical-expressions