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);
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);
}
}
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) {
public static void main(String[] args) {
char d = 'D';
System.out.println((char)(d + 32));
}
}
}