Transfer function in C ?

[integralx2]

Does anyone know how to implement a transfer function in C ? Or how do you get a time domain function, and get it into s-domain in C ? For instance lets say you have 3e^-t in time domain, and in s-domain its 3/(s+1). How to go from time domain to s-domain ?

 

[microKernel]

You'll need to implement the numerical Laplace transform algorithm in C for the conversion.