2020.3.19第一次上机作业

1、已知a,b均是整型变量，写出将a,b两个变量中的值互换的程序

package com.itheima01;
public class HelloWorld {
    public static void main(String[] args)
    {
        int  a=233;
        int  b=322;
        int temp = a;
        a = b; 
        b=temp;
        System.out.println(a+" "+b);
    }
}

2、给定一个0～1000的整数，求各位数的和

package com.itheima01;
public class HelloWorld {
    public static void main(String[] args)
    {
        int  a=12;
        int  x=12%10;
        int  y=12/10;
        int  sum=x+y;
        System.out.println("sum="+sum);
    }
}

 3、华氏度50转成摄氏度是多少

package com.itheima01;

public class HelloWorld {
            public static void main(String[] args)
            {
                int  a=50;
                int  b=(a-32)*5/9;
                System.out.println("华氏度="+b);
            }
}

 4、给定一个任意的大写字母A~Z，转换为小写字母

package com.itheima01;
public class HelloWorld {
    public static void main(String[] args) {    
        char a = 'Z';
        System.out.println((char)(a + 32));
 
    }
}