Use? System;

Namespace? Console application 1

{

//? Simple math? Simple mathematics

Public? Class? Simple mathematics

{

//? increase

Public? Double? Plus (double? First,? Double? b)

{

Return? Answer? +? b；

}

//

Public? Double? Subtract (double? First,? Double? b)

{

Return? Answer? -? b；

}

//? Diverse

Public? Double? Multiply (double? First,? Double? b)

{

Return? Answer? *? b；

}

//? Except for ...

Public? Double? Divide (double? First,? Double? b)

{

Return? Answer? /? b；

}

//? square root

Public? Double? Sqrt(double？ answer

{

Return? mathmatics sqrt(a)；

}

//? force

Public? Double? Power (double? First,? int？ n)

{

Double? r？ =? 1;

for(int？ I = 1； ? I < = n; i++)

{

r？ *=? a；

}

Return? r；

}

}

Class? procedure

{

Static electricity Invalid? Main(string[]？ Parameter)

{

//? Instantiate a simple arithmetic class SimleMath

Simple math? sm？ =? New? simple math()；

Double? r？ =? sm。 Add (100,? 200);

Console. WriteLine(r)；

r？ =? sm。 Subtract (200? ,? 100);

Console. WriteLine(r)；

r？ =? sm。 Multiply by (2.0,? 3.0);

Console. WriteLine(r)；

r？ =? sm。 Except (100,? 5);

Console. WriteLine(r)；

r？ =? sm。 sqrt(80)；

Console. WriteLine(r)；

r？ =? sm。 Power (10,? 3);

Console. WriteLine(r)；

}

}

}