第一次上机作业

1.

package chapter2;
public class set {
public static void main(String[] args) {
		int c;
		int a = 1;
		int b = 2;
		c = a;
		a = b;
		b = c;
		System.out.println("a=" + a + "\nb=" + b);
	}
}

　　

 

 2.

package chapter2;
 	public class set {
 		public static void main(String[] args) {
 	        int a = 345, sum;
 	        int b, c, d, e;
 	        b = a / 1000;         
 	        c = a/ 100 % 10;   
 	        d = a % 100 / 10;   
 	        e = a % 10;          
 	        sum = b + c+ d + e;
 	      System.out.println( "输出的值为" +sum);
	}
}

　　

 

 3.

package chapter2;

	public class set {
		public static void main(String[] args) {
		// TODO Auto-generated method stub
		float huashi = 666, sheshi;
		sheshi = ((huashi - 32) * 5) / 9;
		huashi = ((sheshi * 9) / 5) + 32;
		System.out.println("摄氏度:" + sheshi);
		System.out.println("华氏度:" + huashi);

	}

}

　　

 

 4.

package chapter2;

public class set {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		 char f = 'A'+32;
	        System.out.println("小写为"+f);

	}

}