java第二次作业
public class Test2 { /** * @param args */ public static void main(String[] args) { int r=5; double s=3.14*r*r; System.out.println("圆的面积为S="+s); } }
public class Test2 { /** * @param args */ public static void main(String[] args) { double hua=50; double shua=50-32; shua=shua*5.0/9.0; System.out.println(hua+"华氏度="+shua+"摄氏度"); double she=30; double hshe=she*9.0/5.0+32; System.out.println(she+"摄氏度="+hshe+"华氏度"); } }
public class Test2 { /** * @param args */ public static void main(String[] args) { int a=5; int b=8; int c; System.out.println("a="+a+"\tb="+b); c=a; a=b; b=c; System.out.println("a="+a+"\tb="+b); } }
public class Test2 { /** * @param args */ public static void main(String[] args) { int a=12345; System.out.println("a="+a); a=a/100*100; System.out.println("a="+a); } }
public class Test2 { /** * @param args */ public static void main(String[] args) { int a=456; int ge=a%10; int shi=a%100/10; int bai=a%1000/100; int sum=ge+shi+bai; System.out.println(sum); } }
public class Test2 { /** * @param args */ public static void main(String[] args) { char x='H'; char d='f'; System.out.println("x是"+x+"\t d是"+d); x=(char)(x+32); d=(char)(d-32); System.out.println("x是"+x+"\t d是"+d); } }