EbNoVec =0:20;
BER_Vec=[];
diary ber.txt;
for n=1:length(EbNoVec);
EbNodB=EbNoVec(n);
sim('sc1');
BER_Vec(n,:)=BER;
fprintf('The snr is %d,The ber is %f\n',EbNodB,BER_Vec(n,1));
end
hold on;
semilogy(EbNoVec,BER_Vec(:,1),'+r-');

diary off;