function jobGeneration(jobNumber)
index =0;
jobInfo=zeros(jobNumber,4); % four columns: p, d, w', w''
filePath=strcat('E:\Pros\PSO\jobInfo_',num2str(jobNumber),'.dat');
fid = fopen(filePath,'wt');
while (index<jobNumber)
    p = ceil(rand ()*50);
    d = ceil(abs(randn()*200));
    if (p<d)
        index=index+1;
        w1=rand();
        w2=rand();
        fprintf(fid, '%d\t', p);
        fprintf(fid, '%d\t', d);
        fprintf(fid, '%f\t', w1);
        fprintf(fid, '%f\n', w2);
    end
end