java第二次作业

1.两数互换

package aa;

public class text {

    public static void main(String[] args) {
        int a=1,b=2,c;
        c=a;
        a=b;
        b=c;
        System.out.println("交换后的a:"+a+",b:"+b);
    }

 

 2.每位数字之和

package aa;

public class text {

    public static void main(String[] args) {
        int a,b,c,d,sum;
        int i=6789;
        a=i/1000;
        b=i/100%10;
        c=i/10%10;
        d=i%10;
        sum=a+b+c+d;
        System.out.println("每位数字之和为:"+sum);
    }

}

 

 3.华氏度转摄氏度

package aa;

public class text {

    public static void main(String[] args) {
        float a=50,b;
        b=(a-32)*5/9;
        System.out.println("摄氏度是:"+b);
    }

}

 

 4.大写字母转换小写字母

package aa;

public class text {

    public static void main(String[] args) {
        char b='A';
        System.out.println((char)(b+32));
    }

}