How write a struct into a text file?

I have a 100-by-1 struct array, named fInfo. fInfo have four fields:a1,a2,a3,a4. For example, the fInfo(1,1) is

    fInfo(1,1).a1 = [89 78 90 56];
    fInfo(1,1).a2 = 100
    fInfo(1,1).a3 = 20
    fInfo(1,1).a4 = 'small'

What should I do to write the struct into a text file? I have tried this:

    fid = fopen('result.txt', 'wt+');
    for i = 1:size(fInfo, 1)
        fprintf(fid, '%s\t %d\t %d\t %s\n',fInfo(i,1).a1,fInfo(i,1).a2,fInfo(i,1).a3,fInfo(i,1).a4,);
    end
    fclose(fid);

But,it not works.

Any suggestions?

Answer 1

[Azzi Abdelmalek]

fid = fopen('result.txt', 'wt+');
for i = 1:size(fInfo, 1)
  fprintf(fid, '%d\t',fInfo(i,1).a1),
  fprintf(fid, '%d\t',fInfo(i,1).a2)
  fprintf(fid, '%d\t',fInfo(i,1).a3)
  fprintf(fid, '%s\n',fInfo(i,1).a4)
end
fclose(fid);

[Donghui Sun]

Thanks, It works. I find another way. Firstly, transform the a1 to string,and then use the fprintf. :-)