The three most common operating systems for personal computers are Microsoft Windows, Apple Mac OS X, and Linux.
Answer:
14
Explanation: The reason why is because adding a negative is pretty much subtracting by 2. 9-2=7. Then multiply 7 by 2 like add 7 to 7 and you get 14.
Answer:
A class is like a blueprint of object.
Explanation:
A class defines the kinds of data and the functionality their objects will have.
A class enables you to create your own custom types by grouping together variables of other types, methods and events.
In C#, we can create a class using the class keyword.
Here's a sample program:
using System;
namespace ConsoleApplication
{
public class Test
{
public static void Main()
{
Add a1 = new Add(70, 50);
a1.AddNumbers();
Console.ReadLine();
}
}
class Add
{
private int row;
private int column;
public Add(int r, int c)
{
row = r;
column = c;
}
public void AddNumbers()
{
Console.WriteLine(row+column);
}
}
}
output: 120
Explanation of the program:
I have created a class named Add. Within a class, row and column are two fields and AddNumbers() is a method. We also have constructor to initialize row and column.
In main method, If I need to invoke members of the class, I must create an instance of the class. We can create any number of instances using the single class.IN our program, a1 is the reference variable using which we can invoke members of the class. I invoked function in the class and passed arguments to the constructor while creating an instance.
Those values are assigned to method variables and it operated the addition. Thus the output is 120.
