[filename2,p2]=uigetfile('*.txt','选择输出文件名');
fn=fopen(filename2,'a');

gjzb(1)=struct('dh','3','x',49510.3110,'y',80362.3190,'h',405.8240,'dm','s50')
gjzb(2)=struct('dh','63','x',49488.9080,'y',80426.0080,'h',408.8490,'dm','S77')
fprintf(fn,'%s\n\n','点名    X(m)      Y(m)      H(mm)     code');
for i=1:2
    fprintf(fn,'%8s',gjzb(i).dh);
    fprintf(fn,'%15.3f',gjzb(i).x);
    fprintf(fn,'%16.3f',gjzb(i).y);
    fprintf(fn,'%10.3f',gjzb(i).h);
    fprintf(fn,'%8s\n',strcat(' ',gjzb(i).dm));
end
fclose(fn);