%Lab 25 Solutions
%lab25func
%Patrick D. Schmid

%define a function with retval as return value
%and id_val, cap_val and date_val as parameters
%function name must be identical to file name
function retval = lab25func(id_val, cap_val, date_val)

%open the output file and append instead of overwrite
fid=fopen('output.txt', 'at'); 

%print to the file
fprintf(fid, 'For fuel station %2.0f:\n', id_val);
fprintf(fid, '  Capacity = %5.0f\n', cap_val);
fprintf(fid, '  Date Scheduled = %2.0f\n', date_val);

%close it
fclose(fid);

%set retval to 0
retval = 0;