public class DayFive16 { public static void main(String[] args) { double num = 5.45; int i = si(num);
System.out.println(num + "四舍五入后的值是:" + i);
} public static int si(double num){ int a = (int)(num*10%10);
System.out.println(a); if(a>4){ return (int)num+1;
}else{ return (int)num;
}
}
}"取绝对值"package com.itheiam;
public class DayFive15 { public static void main(String[] args) { double num = jue(-100);
System.out.println("绝对值是:"+ num);
} public static double jue(double num){ if(num<0){