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class classArea {
double x, y;
double area(double x, double y) {
double s;
this.x = x;
y = y;
s = this.x * y;
return s;
}
}
public class c5_11 extends classArea {
public static void main(String[] args) {
double a = 2.2, b = 3.1, z;
c5_11 ss = new c5_11();
z = ss.area(a, b);
System.out.println("z=" + z);
System.out.println("x=" + ss.x);
System.out.println("y=" + ss.y);
}
}
class classArea {
double x, y;
double area(double x, double y) {
double s;
this.x = x;
y = y;
s = this.x * y;
return s;
}
}
public class c5_11 extends classArea {
public static void main(String[] args) {
double a = 2.2, b = 3.1, z;
c5_11 ss = new c5_11();
z = ss.area(a, b);
System.out.println("z=" + z);
System.out.println("y=" + ss.y);
}
}
class A {
int i = 1;
public A(int i) {
this.i = i; //将A方法里的i的值赋给成员变量i
}
}
class Test {
public static void main(String args[]) {
A a = new A(2);//2则赋给了a对象的成员变量i
System.out.println(a.i);
}
}