package cn.edu.bjut.utils;

public class MathUtils {
	public static double logsum(double loga, double logb) {
		double sum = (loga > logb)? 
				(loga + Math.log(1.0 + Math.exp(logb - loga))): (logb + Math.log(1.0 + Math.exp(loga - logb)));
		
		return sum; 
	}
	
	public static void main(String[] args) {
		double loga = 10; 
		double logb = 1000; 
		
		double sum = MathUtils.logsum(loga, logb); 
		System.out.println(sum); 
		System.out.println(Math.exp(1000)); 
	}
}