saveTruss.m
function saveTruss(truss, filename)
% speichert eine Fachwerkstruktur
% Parameter:
% truss Fachwerk-Struktur
% filename Name der Datei (ohne Endung .truss)
fid = fopen(filename + ".truss", "w");
fprintf(fid, "%% x0\n");
fprintf(fid, "%d %d\n", size(truss.x0));
fprintf(fid, " %7.4f", truss.x0);
fprintf(fid, "\n%% A\n");
fprintf(fid, "%d %d\n", size(truss.A));
fprintf(fid, " %1d", truss.A);
fprintf(fid, "\n%% N\n");
fprintf(fid, "%d", truss.N);
fprintf(fid, "\n%% m\n");
fprintf(fid, "%f", truss.m);
fprintf(fid, "\n%% c\n");
fprintf(fid, "%f\n", truss.c);
fclose(fid);