public class Qjh {
/**
* @param args
*/
public static void main(String[] args) {
double r = 6;
double x = r * r * 3.14;
System.out.println("当圆的半径是6时，圆的面积是" + x);// TODO Auto-generated method stub
}
}
public class Qjh {
/**
* @param args
*/
public static void main(String[] args) {
double f = 50;
double x =(f-32)/5*9;
System.out.println("摄氏度是" + x);// TODO Auto-generated method stub
}
}
public class Qjh {
/**
* @param args
*/
public static void main(String[] args) {
double c = 30;
double x =c/9*5+32;
System.out.println("华氏度是" + x);// TODO Auto-generated method stub
}
}
public class Qjh {
/**
* @param args
*/
public static void main(String[] args) {
int a=5,b=8,c;
c=a; a=b; b=c;
System.out.println("a是" + a + "b是" + b);// TODO Auto-generated method stub
}
}
public class Qjh {
/**
* @param args
*/
public static void main(String[] args) {
int a=12345 ;
int b=12345/10000;
int c=12345%10000/1000;
int d=12345%1000/100;
System.out.println(b*10000+c*1000+d*100);// TODO Auto-generated method stub
}
}
public class Qjh {
/**
* @param args
*/
public static void main(String[] args) {
int a=1234/1000;
int b=1234%1000/100;
int c=1234%100/10;
int d=1234%10;
System.out.println(a+b+c+d);// TODO Auto-generated method stub
}
}
public class Qjh {
/**
* @param args
*/
public static void main(String[] args) {
char c='A';
System.out.println((char) ( c + 32));
char d='a';
System.out.println((char)(d-32));// TODO Auto-generated method stub
}
}
