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  1. interface calc1870
  2. {
  3.     void add();
  4.     void sub();
  5. }
  6. class calc2024 implements calc1870
  7. {
  8.     void add();
  9. }
  10.  int a=10,b=20;
  11. system.out.println("add is 7"+(a+b);
  12. }
  13. void sub()
  14. {
  15.     int a=20,b=10;
  16.     system.out.println("sub is="+(a-b));
  17. }
  18. }
  19. class interface 2024
  20. {
  21.     public static void main(string args[])
  22. {
  23.     cal2024 a=new cal2024();
  24.        a.add();
  25.        a.sub();
  26. }
  27. }
Success #stdin #stdout 0.02s 26108KB
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interface calc1870
{
    void add();
    void sub();
}
class calc2024 implements calc1870
{
    void add();
}
 int a=10,b=20;
system.out.println("add is 7"+(a+b);
}
void sub()
{
    int a=20,b=10;
    system.out.println("sub is="+(a-b));
}
}
class interface 2024
{
    public static void main(string args[])
{
    cal2024 a=new cal2024();
       a.add();
       a.sub();
}
}
https://ideone.com/hrbWDI
language:
PHP (php 7.3.5)
created:
10 days ago
visibility:
public

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