function [newp1,newp2] = crossover(oldp1,oldp2) ;
crossj1 =floor ((length(oldp1)-1)*rand) + 1 ;
crossj2 =floor ((length(oldp1)-1)*rand) + 1 ;
minjcross = min(crossj1 ,crossj2);
maxjcross = max(crossj1 ,crossj2);
segment1 = oldp1(minjcross:maxjcross);
segment2 = oldp2(minjcross:maxjcross);
oldp12 = eliminate(oldp1,segment2); %其中eliminate 是自定義函數(shù)
oldp21 = eliminate(oldp2,segment1);
newp1 = [segment2 oldp12];
newp2 = [segment1 oldp21];