C++/Development/Mutable

Make current mutable

<source lang="cpp">

1. include <iostream>

using namespace std; class Timer {

 int step;
 int target;
 mutable int current; 

public:

 Timer(int delay, int i=1) {
   target = delay;
   step = i;
   current = 0;
 }
 bool counting() const {
   current += step;
   if(current >= target) {
     cout << "\a";
     return false;
   }
   cout << current << " ";
   return true;
 }

}; int main() {

 Timer ob(200, 4);
 while(ob.counting()) ;
 return 0;

}

      </source>