Java第二次作业
public class qqq { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub double r = 10; double area = 3.14 * r * r ; System.out.println("半径是3时,圆的面积是"+ area); } }
2.
package ktlx; public class lx2 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub double h1=50,s1; s1=(h1-32)*5/9; System.out.println(s1); double s2=30,h2; h2=s2*9/5+32; System.out.println(h2); } }
3.
package ktlx; public class lx3 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub int a=5,b=8,c; c=a; a=b; b=c; System.out.println(a); System.out.println(b); }
4.
public class TestHello { /** * @param args */ public static void main(String[] args) { int a=33333; System.out.println("a="+a); a=a/100*100; System.out.println("a="+a); // TODO Auto-generated method stub } }
5.
public class TestHello { /** * @param args */ public static void main(String[] args) { int a=333; int ge=a%10; int shi=a%100/10; int bai=a%1000/100; int sum=ge+shi+bai; System.out.println(sum); // TODO Auto-generated method stub } }
6.
public class TestHello { /** * @param args */ public static void main(String[] args) { char m='A'; char n='f'; System.out.println("m是"+m+"\t n是"+n); m=(char)(m+32); n=(char)(n-32); System.out.println("m是"+m+"\t n是"+n); // TODO Auto-generated method stub } }