class book{
public String name;
public String getName() {
return this.name;
}
public void setName() {
this.name = name;
class student extends Person {
protected book b;
protected int score;
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银发的index
class book{
public String name;
public String getName() {
return this.name;
}
public void setName() {
this.name = name;
}
}
class student extends Person {
protected book b;
protected int score;
}