// Example of using the GeographicLib::Accumulator class#include <iostream>#include <exception>#include <GeographicLib/Accumulator.hpp>usingnamespacestd;usingnamespaceGeographicLib;intmain(){try{// Compare using Accumulator and ordinary summation for a sum of large and// small terms.doublesum=0;Accumulator<>acc=0;sum+=1e20;sum+=1;sum+=2;sum+=100;sum+=5000;sum+=-1e20;acc+=1e20;acc+=1;acc+=2;acc+=100;acc+=5000;acc+=-1e20;cout<<sum<<" "<<acc()<<"\n";}catch(constexception&e){cerr<<"Caught exception: "<<e.what()<<"\n";return1;}}