package shangji;
public class dierzhang {
public static void main(String[] args) {
// TODO Auto-generated method stub
int r=2;
System.out.println(3.14*r*r);
}
}
package shangji;
public class dierzhang {
public static void main(String[] args) {
// TODO Auto-generated method stub
double hua=50;
System.out.println(hua-32*5/9);
}
}
package shangji;
public class dierzhang {
public static void main(String[] args) {
// TODO Auto-generated method stub
double she=30;
System.out.println(she*5/9+32);
}
}
package shangji;
public class dierzhang {
public static void main(String[] args) {
// TODO Auto-generated method s
int a=5,b=8,c;
c=a;
a=b;
b=c;
System.out.println("a是"+a+"b是"+b);
}
}
package shangji;
public class dierzhang {
public static void main(String[] args) {
// TODO Auto-generated method s
int shu=12345,baiwei;
baiwei=shu/100*100;
System.out.println(baiwei);
}
}
package shangji;
public class dierzhang {
public static void main(String[] args) {
// TODO Auto-generated method s
int shu=2580,sum;
sum=(shu%10)+(shu%100/10)+(shu%1000/100)+(shu/1000);
System.out.println(sum);
}
}
package shangji;
public class dierzhang {
public static void main(String[] args) {
// TODO Auto-generated method s
char daxie,xiaoxie,shuchu;
daxie='A';
shuchu=(char) (daxie+32);
System.out.println(shuchu);
xiaoxie='a';
shuchu=(char) (xiaoxie-32);
System.out.println(shuchu);
}
}
