package operator;
public class Shabi1 {
public static void main(String[] args) {
//二元运算符 //ctrl * d：复制当前到下一行
int a=10; int b=20; int c=25; int d=25; System.out.println(a+b); System.out.println(a-b); System.out.println(a*b); System.out.println(a/(double)b); }}
package operator;
public class Shabi3 {
public static void main(String[] args) {
//关键运算符返回的结果：正确，错误 布尔值
int a=10; int b=20; int c=21;
//取余 模运算 System.out.println((c%a));// c/a取余
System.out.println(a>b); System.out.println(a<b); System.out.println(a==b); System.out.println(a!=b); }}
package operator;
public class Shabi2 {
public static void main(String[] args) {
long a =123123123123L;
int b =123;
short c = 10;
byte d =8;
System.out.println(a+b+c+d);//Long
System.out.println(b+c+d);//Int
System.out.println(c+d);//Int }}
