319上机练习

package one;

public class Demo01 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int a = 5;
		int b = 6;
		int c = a;
		a = b;
		b = c;
		System.out.println(a);  
		System.out.println(b);
	}
}

　　

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。

2、给定一个0～1000的整数，求各位数的和，例如345的结果是3+4+5＝12

package one;

public class Demo01 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int a = 456;
        int ge = a%10;
        int shi = a/10%10;
        int bai = a/100%10;
        int total = ge + shi + bai;
        System.out.println(total);
    }
}

3、华氏度与摄氏度之间的转化问题

package one;

public class Demo01 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int hua = 50;
        int she = (hua - 32)*5/9;
        System.out.println(she);
    }
}

4、给定大写字母A,将其转化为小写字母

package one;

public class Demo02 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        char c = 'A';
        char c2 = 'A' + 32;
        System.out.println(c2);
    }
}