/**
* 求绝对值
*/
import java.util.*;
public class acm2003 {
public static void main(String[] args) {
Scanner in=new Scanner(System.in);
while(in.hasNextDouble()){
double a=in.nextDouble();
if(a<0){
a=-a;
System.out.printf("%.2f",a);
System.out.println();
}else{
System.out.printf("%.2f",a);
System.out.println();
}
}
}
}
acm2003
原文：http://blog.csdn.net/a736933735/article/details/43735157
