void process_commands(std::string preface) { for (;;) try { std::string command = menu_prompt(preface); if (command == "an") { std::string n = ics::prompt_string(" Enter node name"); g.add_node(n); } else if (command == "ae") { std::string o = ics::prompt_string(" Enter origin node name"); std::string d = ics::prompt_string(" Enter destination node name"); int v = ics::prompt_int (" Enter value for this edge "); g.add_edge(o,d,v); } else if (command == "rn") { std::string n = ics::prompt_string(" Enter node name"); g.remove_node(n); } else if (command == "re") { std::string o = ics::prompt_string(" Enter origin node name"); std::string d = ics::prompt_string(" Enter destination node name"); g.remove_edge(o,d); } else if (command == "x") g.clear(); else if (command == "=") { ics::HashGraph<int> g2(ics::prompt_graph()); g = g2; } else if (command == "m") std::cout << " empty() = " << g.empty() << std::endl; else if (command == "#n") std::cout << " node_count() = " << g.node_count() << std::endl; else if (command == "#e") std::cout << " edge_count() = " << g.edge_count() << std::endl; else if (command == "n") { std::string n = ics::prompt_string(" Enter node name"); std::cout << " has_node(...) = " << g.has_node(n) << std::endl; } else if (command == "e") { std::string o = ics::prompt_string(" Enter origin node name"); std::string d = ics::prompt_string(" Enter destination node name"); std::cout << " has_edge(...) = " << g.has_edge(o,d) << std::endl; } else if (command == "v") { std::string o = ics::prompt_string(" Enter origin node name"); std::string d = ics::prompt_string(" Enter destination node name"); std::cout << " edge_value(...) = " << g.edge_value(o,d) << std::endl; } else if (command == "i") { std::string n = ics::prompt_string(" Enter node name"); std::cout << " in_degree(...) = " << g.in_degree(n) << std::endl; } else if (command == "o") { std::string n = ics::prompt_string(" Enter node name"); std::cout << " out_degree(...) = " << g.out_degree(n) << std::endl; } else if (command == "d") { std::string n = ics::prompt_string(" Enter node name"); std::cout << " degree(...) = " << g.degree(n) << std::endl; } else if (command == "<") std::cout << preface+" << = " << g << std::endl; else if (command == "r") { std::cout << " g == g = " << (g == g) << std::endl; std::cout << " g != g = " << (g != g) << std::endl; ics::HashGraph<int> g2(ics::prompt_graph()); std::cout << " g == g2 = " << (g == g2) << std::endl; std::cout << " g != g2 = " << (g != g2) << std::endl; } else if (command == "l") { std::string separator = prompt_string(" Enter separator used in file"); std::ifstream in_file; ics::safe_open(in_file," Enter file name to read graph from","graph.txt"); g.load(in_file,separator); } else if (command == "s") { std::string separator = prompt_string(" Enter separator to use in file"); std::ofstream out_file; out_file.open(ics::prompt_string(" Enter file name to store graph in").c_str()); if (out_file.fail()) std::cout << " Illegal file name" << std :: endl; else g.store(out_file,separator); } else if (command == "q") break; else std::cout << preface+"\""+command+"\" is unknown command" << std::endl; } catch (ics::IcsError& e) { std::cout << preface+" " << e.what() << std::endl; } }