Added end-of-questions screen with time elapsed.

main.cpp

@@ -9,6 +9,7 @@
 #include "Problem.h"
 
 #include <vector>
+#include <chrono>
 
 #define PROMPT " > "
 
@@ -62,8 +63,12 @@ int main(int argc, char *argv[])
 			if(problem)
 				problem->Draw(problem == *selected, input_style);
 
+		// Keep track of time:
+		auto start_time = std::chrono::steady_clock::now();
+
 		while(selected != problems.end() && *selected)
 		{
+
 			Problem *current_problem = *selected;
 			current_problem->Draw(true, input_style); // refresh with new input
 			auto input = getch();
@@ -101,6 +106,22 @@ int main(int argc, char *argv[])
 			current_problem->Draw(current_problem == *selected, input_style); // refresh with new input
 		}
 
+		// Keep track of time:
+		auto end_time = std::chrono::steady_clock::now();
+		auto elapsed_time = std::chrono::duration_cast<std::chrono::seconds>(end_time - start_time);
+		int middle_h = COLS / 2;
+		int middle_v = LINES / 2;
+		clear();
+		mvprintw(middle_v - 1, middle_h - 10,
+		         "Time Elapsed: %02dm %02ds\n",
+		         elapsed_time / 60, elapsed_time % 60);
+		mvprintw(middle_v + 1, middle_h - 8,
+		         "Press Q to quit.");
+		wrefresh(stdscr);
+
+		while(!(getch() == 'q'))
+			;
+
 		for(auto *problem : problems)
 			if(problem)
 				delete problem;