運算子(operators)

運算子(operators)

public class operators_operands {

	public static void main(String[] args) {
		int a=5, b=2;	// 同類型變數可連續宣告
		int sum1, sum2;                                                     >       
		System.out.println(a/b);	// 商，取整數部分
		System.out.println(a%b);	// 取餘數
		
		sum1 = ++a;	// ++前置(prefix),  a先+1,再將a值指派給sum1 
		sum2 = b++;	// ++後置(postfix), b值先指派給sum2,b再+1
		
		System.out.println(sum1);
		System.out.println(sum2);
	}
}

前置運算子(prefixPostfix)

public class PrefixPostfix {

	public static void main(String[] args) {
		int x=3;
		System.out.println("Before Prefix X = "+ ++x);
		System.out.println("After Prefix X = "+ x);
		
		x=3;
		System.out.println("Before Postfix X = "+ x++);
		System.out.println("After Postfix X = "+ x);
	}

}