function [X, f1] = DeJong2(Xi)
n = 2;

LL = -2.048;              %Lower limit
UL = 2.048;               %Upper limit
X = LL + rand(1,n)*(UL-LL);% step1 Choose starting design X, 
f1 = 100*(X(1).^2 - X(2)).^2 + (1-X(1)).^2;
end