java算数运算符的应用

代码

public class qq {
public static void main(String[] args) {
int A=10;
System.out.println(-A);
int b=A++;
System.out.println(b);
b=++A;
System.out.println(b);

}

}

public class qq {
public static void main(String[] args) {
float f1 = 18 % 4;// 保存取余后浮点类型的结果
double da = 18 + 4.5; // 双精度加法
double db = 18 - 3.0; // 双精度减法
double dc =18* 2.5; // 双精度乘法
double dd = 18/ 3.0; // 双精度除法
double de = 18 % 4; // 双精度取余

    System.out.println("整数的算术运算");//整数的加减乘除取余
    System.out.printf("18+4=%d \n", 18 + 4);
    System.out.printf("18-4=%d \n", 18 - 4);
    System.out.printf("18*4=%d \n", 18 * 4);
    System.out.printf("18/4=%d \n", 18/ 4);
    System.out.printf("18%%4=%d \n", 18 % 4);


    System.out.println("\n浮点数的算术运算"); // 浮点数的加、减、乘、除和取余
    System.out.printf("18+4.5f=%f \n", 18 + 4.5f);
    System.out.printf("18-3.0f=%f \n", 18 - 3.0f);
    System.out.printf("18*2.5f=%f \n", 18 * 2.5f);
    System.out.printf("18/3.0f=%f \n", 18 / 3.0f);
    System.out.printf("18%%4=%f \n", f1);

    System.out.println("\n双精度数的算术运算"); // 双精度数的加、减、乘、除和取余
    System.out.printf("18+4.5=%4.16f \n", da);
    System.out.printf("18-3.0=%4.16f \n", db);
    System.out.printf("18*2.5=%4.16f \n", dc);
    System.out.printf("18/3.0=%4.16f \n", dd);
    System.out.printf("18%%4=%4.16f \n", de);

    System.out.println("\n字符的算术运算"); // 对字符的加法和减法
    System.out.printf("'A'+32=%d \n", 'A' + 32);
    System.out.printf("'A'+32=%c \n", 'A' + 32);
    System.out.printf("'a'-'B'=%d \n", 'a' - 'B');
}

}

public class qq {
public static void main(String[] args) {
int a=5;
int b=10;
a+=b;//相当于a=a+b
System.out.println(a);
a+=b+3;//相当于a=a+b+3
System.out.println(a);
a-=b;//相当于a=a-b
System.out.println(a);
a*=b;//相当于a*b；
System.out.println(a);
a/=b;//相当于a=a/b
System.out.println(a);
a%=b;//相当于a=a%b
System.out.println(a);
}
}