找出较大的一个数

There are two int variables : a and b , don't use "if","? :","switch" or other judgement statements , find out the biggest one of the two numbers.

 

 

max = ((a+b)+|a-b|)/2;

 

当a>=b时，|a-b|为a-b，max=(a+b+a-b)/2=a;

当a<b时，|a-b|为-(a-b)，max=(a+b-a+b)/2=b;