JAVA 第一次上机作业 计算机1804 张垚

1.

package pp;

public class H {
 public static void main(String[] args) {
  
    int a = 7;
    int b = 2;
    int tmp;
    tmp = a;
    a = b;
    b = tmp;
    System.out.println("交换后的a:"+ a + ",b:" + b);

 }
 
}

 

2.

package pp;

public class X {
 public static void main(String[] args) {
 
  int a=6789;
  int b,c,d,e,He;
 b=a/1000;
 c=a/100%10;
 d=a/10%10;
 e=a%10;
 He=b+c+d+e;
 System.out.println ("结果为"+He);
   }
}

 

 

3.package pp;
public class Q{
 public static void main(String[] args) {
 double z=30;
 double qq;
 qq=(z-32)*5/9;
 System.out.println("转成摄氏为" +qq );
}
}

 

 4.

package pp;

public class A {
  public static void main(String[] args) {

   char d = 'D';

   System.out.println((char)(d + 32));
  }

 }