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É裺gunΪ¸¸À࣬shootgunºÍpistolΪgunµÄ×ÓÀà¡£
Java:
class gun {
void shoot() {
System.out.println("gun shoot");
}
}
class shootgun extends gun {
void shoot() {
System.out.println("shootgun shoot");
}
}
class pistol extends gun {
void shoot() {
System.out.println("pistol shoot");
}
}
C++:
class gun
{
void shoot()
{
cout << "gun shoot" << endl;
}
};
class shootgun : gun
{
void shoot()
{
cout << "shootgun shoot" << endl;
}
};
class pistol : gun
{
void shoot()
{
cout << "pistol shoot" << endl;
&n
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String stra[] = {"g","b","c","h","k"};//ÔʼÊý×é
String strb[] = {"g","k"}; //ÒÆ³ýµÄÔªËØ
ArrayList list = new ArrayList();
//·½·¨Ò»
for(int i=0;i<stra.length;i++){
int n=0;
......
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public class Test {
/**
* @param args
*/
public static void main(String[] args) {
/**
* ÇóÖÊÊýºÍ£¬
* Èç:
* sum(1)=2=2
* sum(2)=2+3=5
* sum(3)=2+3+5=10
* sum(4)=2+3+5+7=17
& ......