How to plot 4 curves with different constants?

I want to plot y = (C - x)/(1+x^2) with 4 different values of C where C is always an integer. I know I can just define 4 different functions but I'm looking for a way to define y as written and define C as an array or something and plotting y with different C values.

Answer 1

[Torsten]

y = @(C,x) (C-x)./(1+x.^2);
C = [1 2 3 4].';
x = -2:0.1:2;
plot(x,y(C,x))