public class YuanMianJi{
public static void main(String[] args){
final double PI=3.14;
int R=5;
double ymj=PI*R*R;
System.out.println("圆的面积等于"+ymj);
}
}
public class YuanMianJi{
public static void main(String[] args){
final double PI=3.14;
int R=5;
double ymj=PI*R*R;
System.out.println("圆的面积等于"+ymj);
}
}
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