int main()
{
while(read_case()) solve_case();
return 0;
}
int main()
{
input = fopen("equation.in","r");
assert(input!=NULL);
while (read_case()) solve_case();
fclose(input);
return 0;
}
int main()
{
assert(fin=fopen(input,"r"));
assert(fout=fopen(output,"w")); //if there is no output file, comment this line
while (read_case()) solve_case();
fclose(fin);
fclose(fout); //if there is no output file, comment this line
return 0;
}
int main(void)
{
in = fopen("humanknot.in", "r");
out = fopen("humanknot.out", "w");
assert(in && out);
while (read_case()) {
solve_case();
}
return 0;
}
int main(void)
{
freopen("randomwalk.in", "r", stdin);
freopen("randomwalk.out", "w", stdout);
while (read_case()) {
solve_case();
}
return 0;
}
int main(void)
{
pi = acos(-1);
while (read_case()) {
if (acceptable()) {
printf("Acceptable\n");
} else {
printf("Not acceptable\n");
}
}
return 0;
}
int main(void)
{
int case_num = 0;
int i;
if (!(in = fopen("openclose.in", "r")) ||
!(out = fopen("openclose.out", "w"))) {
fprintf(stderr, "Cannot open input/output.\n");
exit(1);
}
while (read_case()) {
if (case_num++) {
for (i = 0; i < 75; i++) {
fputc('=', out);
}
fputc('\n', out);
}
fprintf(out, "Case %d\n\n", case_num);
solve_case();
}
return 0;
}
int main(int argc, char *argv[])
{
exit_if_false(argc == 2,"exactly one input argument required");
timer_start();
//-------------------------------------------------------------------//
// counters
int i, n;
// file paths
char *input_file_path, *geometry_file_path, *case_file_path, *data_file_path, *data_numbered_file_path, *display_file_path, *display_numbered_file_path;
exit_if_false(geometry_file_path = (char *)malloc(MAX_STRING_LENGTH * sizeof(char)),"allocating geometry file path");
exit_if_false(case_file_path = (char *)malloc(MAX_STRING_LENGTH * sizeof(char)),"allocating case file path");
exit_if_false(data_file_path = (char *)malloc(MAX_STRING_LENGTH * sizeof(char)),"allocating data file path");
exit_if_false(data_numbered_file_path = (char *)malloc(MAX_STRING_LENGTH * sizeof(char)),"allocating data numbered file path");
exit_if_false(display_file_path = (char *)malloc(MAX_STRING_LENGTH * sizeof(char)),"allocating display file path");
exit_if_false(display_numbered_file_path = (char *)malloc(MAX_STRING_LENGTH * sizeof(char)),"allocating display numbered file path");
// print string
char *print;
exit_if_false(print = (char *)malloc(MAX_STRING_LENGTH * sizeof(char)),"allocating the print string");
// mesh structures
int n_nodes, n_faces, n_elements, n_boundaries_old = 0, n_boundaries, n_terms;
struct NODE *node;
struct FACE *face;
struct ELEMENT *element;
struct BOUNDARY *boundary_old = NULL, *boundary;
struct TERM *term;
EXPRESSION *initial = NULL;
// solution vectors
int n_u_old = 0, n_u;
double *u_old = NULL, *u;
// files
FILE *input_file, *case_file, *data_file, *geometry_file, *display_file;
//-------------------------------------------------------------------//
// opening the input file
print_info("opening the input file %s",argv[1]);
input_file_path = argv[1];
input_file = fopen(input_file_path,"r");
exit_if_false(input_file != NULL,"opening %s",input_file_path);
// reading the case file path
print_info("reading the case file path");
exit_if_false(fetch_value(input_file,"case_file_path",'s',case_file_path) == FETCH_SUCCESS,"reading case_file_path from %s",input_file_path);
print_continue(case_file_path);
// reading the number of variables, variable names and orders
print_info("reading the variables");
int n_variables_old = 0, n_variables;
exit_if_false(fetch_value(input_file,"number_of_variables",'i',&n_variables) == FETCH_SUCCESS,"reading number_of_variables from %s",input_file_path);
int *variable_order_old = NULL, *variable_order = (int *)malloc(n_variables * sizeof(int));
exit_if_false(variable_order != NULL,"allocating orders");
exit_if_false(fetch_vector(input_file, "variable_order", 'i', n_variables, variable_order) == FETCH_SUCCESS,"reading variable_order from %s",input_file_path);
char **variable_name = allocate_character_matrix(NULL,n_variables,MAX_STRING_LENGTH);
exit_if_false(variable_name != NULL,"allocating variable names");
warn_if_false(fetch_vector(input_file,"variable_name",'s',n_variables,variable_name) == FETCH_SUCCESS,"reading variable_name from %s",input_file_path);
for(i = 0; i < n_variables; i ++) print_continue("%s order %i",variable_name[i],variable_order[i]);
// reading the number of inner and outer iterations to perform
print_info("reading the numbers of iterations");
int outer_iteration = 0, inner_iteration;
int n_outer_iterations, n_inner_iterations, data_n_outer_iterations, display_n_outer_iterations;
exit_if_false(fetch_value(input_file,"number_of_inner_iterations",'i',&n_inner_iterations) == FETCH_SUCCESS,"reading number_of_inner_iterations from %s",input_file_path);
exit_if_false(fetch_value(input_file,"number_of_outer_iterations",'i',&n_outer_iterations) == FETCH_SUCCESS,"reading number_of_outer_iterations from %s",input_file_path);
print_continue("%i outer of %i inner iterations to be done",n_outer_iterations,n_inner_iterations);
// read existing case and data
case_file = fopen(case_file_path,"r");
if(case_file != NULL)
{
print_info("reading existing case file %s",case_file_path);
read_case(case_file, &n_variables_old, &variable_order_old, &n_nodes, &node, &n_faces, &face, &n_elements, &element, &n_boundaries_old, &boundary_old);
fclose(case_file);
n = 0; for(i = 0; i < n_variables; i ++) n += n_elements*ORDER_TO_N_BASIS(variable_order[i]);
if(fetch_value(input_file,"initial_data_file_path",'s',data_file_path) == FETCH_SUCCESS)
{
print_info("reading existing data file %s",data_file_path);
exit_if_false(data_file = fopen(data_file_path,"r"),"opening %s",data_file_path);
read_data(data_file, &n_u_old, &u_old, &outer_iteration);
fclose(data_file);
exit_if_false(n_u_old == n,"case and initial data does not match");
}
}
// construct new case
else
{
print_info("reading the geometry file path");
exit_if_false(fetch_value(input_file,"geometry_file_path",'s',geometry_file_path) == FETCH_SUCCESS,"reading geometry_file_path from %s",input_file_path);
print_continue(geometry_file_path);
print_info("reading the geometry file %s",geometry_file_path);
exit_if_false(geometry_file = fopen(geometry_file_path,"r"),"opening %s",geometry_file_path);
read_geometry(geometry_file, &n_nodes, &node, &n_faces, &face, &n_elements, &element);
fclose(geometry_file);
print_continue("%i nodes, %i faces and %i elements",n_nodes,n_faces,n_elements);
print_info("generating additional connectivity and geometry");
process_geometry(n_nodes, node, n_faces, face, n_elements, element);
}
// read the data file path and output frequency
print_info("reading the data file path and output frequency");
exit_if_false(fetch_value(input_file,"data_file_path",'s',data_file_path) == FETCH_SUCCESS,"reading data_file_path from %s",input_file_path);
if(fetch_value(input_file,"data_number_of_outer_iterations",'i',&data_n_outer_iterations) != FETCH_SUCCESS)
data_n_outer_iterations = n_outer_iterations + outer_iteration;
print_continue("data to be written to %s every %i outer iterations",data_file_path,data_n_outer_iterations);
// read boundaries
print_info("reading boundaries");
boundaries_input(input_file, n_faces, face, &n_boundaries, &boundary);
print_continue("%i boundaries",n_boundaries);
// read terms
print_info("reading PDE terms");
terms_input(input_file, &n_terms, &term);
print_continue("%i terms",n_terms);
// update unknown indices and values
print_info("updating the numbering of the degrees of freedom");
update_element_unknowns(n_variables_old, n_variables, variable_order_old, variable_order, n_elements, element, n_u_old, &n_u, u_old, &u);
print_continue("%i degrees of freedom",n_u);
// update face boundaries
print_info("updating the face boundary associations");
update_face_boundaries(n_variables, n_faces, face, n_boundaries, boundary);
// update integration
print_info("updating integration");
i = update_face_integration(n_variables_old, n_variables, variable_order_old, variable_order, n_faces, face);
if(i) print_continue("updated %i face quadratures",i);
i = update_element_integration(n_variables_old, n_variables, variable_order_old, variable_order, n_elements, element);
if(i) print_continue("updated %i element quadratures",i);
// update numerics
print_info("updating numerics");
i = update_face_numerics(n_variables_old, n_variables, variable_order_old, variable_order, n_faces, face, n_boundaries_old, boundary_old);
if(i) print_continue("updated %i face interpolations",i);
i = update_element_numerics(n_variables_old, n_variables, variable_order_old, variable_order, n_elements, element);
if(i) print_continue("updated %i element interpolations",i);
// write case file
print_info("writing case file %s",case_file_path);
exit_if_false(case_file = fopen(case_file_path,"w"),"opening %s",case_file_path);
write_case(case_file, n_variables, variable_order, n_nodes, node, n_faces, face, n_elements, element, n_boundaries, boundary);
fclose(case_file);
// read the display file path and output frequency
print_info("reading the display file path and output frequency");
if(
fetch_value(input_file,"display_file_path",'s',display_file_path) == FETCH_SUCCESS &&
fetch_value(input_file,"display_number_of_outer_iterations",'i',&display_n_outer_iterations) == FETCH_SUCCESS
)
print_continue("display to be written to %s every %i outer iterations",display_file_path,display_n_outer_iterations);
else
{
display_n_outer_iterations = 0;
warn_if_false(0,"display files will not be written");
}
// initialise
if(initial_input(input_file, n_variables, &initial))
{
print_info("initialising the degrees of freedom");
initialise_values(n_variables, variable_order, n_elements, element, initial, u);
}
//-------------------------------------------------------------------//
// allocate and initialise the system
print_info("allocating and initialising the system");
SPARSE system = NULL;
initialise_system(n_variables, variable_order, n_elements, element, n_u, &system);
double *residual, *max_residual, *du, *max_du;
exit_if_false(residual = (double *)malloc(n_u * sizeof(double)),"allocating the residuals");
exit_if_false(max_residual = (double *)malloc(n_variables * sizeof(double)),"allocating the maximum residuals");
exit_if_false(du = (double *)malloc(n_u * sizeof(double)),"allocating du");
exit_if_false(max_du = (double *)malloc(n_variables * sizeof(double)),"allocating the maximum changes");
exit_if_false(u_old = (double *)realloc(u_old, n_u * sizeof(double)),"re-allocating u_old");
timer_reset();
// iterate
print_info("iterating");
n_outer_iterations += outer_iteration;
for(; outer_iteration < n_outer_iterations; outer_iteration ++)
{
print_output("iteration %i", outer_iteration);
for(i = 0; i < n_u; i ++) u_old[i] = u[i];
for(inner_iteration = 0; inner_iteration < n_inner_iterations; inner_iteration ++)
{
calculate_system(n_variables, variable_order, n_faces, face, n_elements, element, n_terms, term, n_u, u_old, u, system, residual);
exit_if_false(sparse_solve(system, du, residual) == SPARSE_SUCCESS,"solving system");
for(i = 0; i < n_u; i ++) u[i] -= du[i];
calculate_maximum_changes_and_residuals(n_variables, variable_order, n_elements, element, du, max_du, residual, max_residual);
for(i = 0; i < n_variables; i ++) sprintf(&print[26*i],"%.6e|%.6e ",max_du[i],max_residual[i]);
print_continue("%s",print);
}
slope_limit(n_variables, variable_order, n_nodes, node, n_elements, element, n_boundaries, boundary, u);
if(data_n_outer_iterations && outer_iteration % data_n_outer_iterations == 0)
{
generate_numbered_file_path(data_numbered_file_path, data_file_path, outer_iteration);
print_info("writing data to %s",data_numbered_file_path);
exit_if_false(data_file = fopen(data_numbered_file_path,"w"),"opening %s",data_numbered_file_path);
write_data(data_file, n_u, u, outer_iteration);
fclose(data_file);
}
if(display_n_outer_iterations && outer_iteration % display_n_outer_iterations == 0)
{
generate_numbered_file_path(display_numbered_file_path, display_file_path, outer_iteration);
print_info("writing display to %s",data_numbered_file_path);
exit_if_false(display_file = fopen(display_numbered_file_path,"w"),"opening %s",display_numbered_file_path);
write_display(display_file, n_variables, variable_name, variable_order, n_elements, element, n_u, u);
fclose(display_file);
}
timer_print();
}
//-------------------------------------------------------------------//
print_info("freeing all memory");
fclose(input_file);
free(geometry_file_path);
free(case_file_path);
free(data_file_path);
free(data_numbered_file_path);
free(display_file_path);
free(display_numbered_file_path);
free(print);
destroy_nodes(n_nodes,node);
destroy_faces(n_faces,face,n_variables);
destroy_elements(n_elements,element,n_variables);
destroy_boundaries(n_boundaries_old,boundary_old);
destroy_boundaries(n_boundaries,boundary);
destroy_terms(n_terms,term);
destroy_initial(n_variables,initial);
free(variable_order_old);
free(variable_order);
destroy_matrix((void *)variable_name);
free(u_old);
free(u);
sparse_destroy(system);
free(residual);
free(max_residual);
free(du);
free(max_du);
return 0;
}