progressBar: use chrono instead of clock

src/progressBar.hpp

@@ -17,8 +17,8 @@
 
 #ifndef PROGRESSBARE_HPP
 #define PROGRESSBARE_HPP
-#include <time.h>
 #include <iostream>
+#include <chrono>
 
 class ProgressBar {
 	public:
@@ -31,7 +31,8 @@ class ProgressBar {
 		std::string _mess;
 		int _maxValue;
 		int _progressLen;
-		clock_t last_time; //records the time of last progress bar update 
+		//records the time of last progress bar update
+		std::chrono::time_point<std::chrono::system_clock> last_time;
 		bool _quiet;
 		bool _first;
 };