c# question how do i pass variables to the main, while in cl

Mal Coppo

8y1.1kVisual Studio

using System;

public class Program

{

public void CalculateArea(int Height, int Base, int Area) //function header

{

Console.Write("Enter Height: ");

Height = int.Parse(Console.ReadLine());

Console.Write("Enter Base: ");

Base = int.Parse(Console.ReadLine());

Area = Height * Base / 2;

Console.WriteLine("Area of Triangle = {0}", Area);

}

public void Validation(int Height, int Base, int Area){

}

public void Main(string[] args)

{

Console.WriteLine("Triangle Area Calculator");

CalculateArea(); //function call

Console.WriteLine("Program Complete");

}

3 Replies

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Mal Coppo8y ago
Hold on so you do not use a copy constructor, or a dot operator in themain document of a call function when passing in a variable rather coping oe delegating.

using System;
public class Program
{
public int CalculateArea(int Height, int Base, int Area) //function header
{
Console.Write("Enter Height: ");
Height = int.Parse(Console.ReadLine());
Console.Write("Enter Base: ");
Base = int.Parse(Console.ReadLine());
Area = Height * Base / 2;
return Area;
}
public void Validation(int Height, int Base, int Area)
{
}
public void Main(string[] args)
{
int Variable one;
int Variable two;
//shouldn't it actually have a dot operator
Program programcopy;
Programcopy.CalculateArea(Variable one, variable two);
Console.WriteLine(Variable one *Variable two);
}
}

using System;
public class Program
{
public int CalculateArea(int Height, int Base, int Area) //function header
{
Console.Write("Enter Height: ");
Height = int.Parse(Console.ReadLine());
Console.Write("Enter Base: ");
Base = int.Parse(Console.ReadLine());
Area = Height * Base / 2;
return Area;
}
public void Validation(int Height, int Base, int Area)
{
}
public void Main(string[] args)
{
Console.WriteLine("Triangle Area Calculator");
Area = CalculateArea(); //function call
Console.WriteLine("Area of Triangle = {0}", Area);
Console.WriteLine("Program Complete");
}
}

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Compilation error (line 22, col 3): The name 'Area' does not exist in the current context
Compilation error (line 22, col 10): No overload for method 'CalculateArea' takes 0 arguments
Compilation error (line 23, col 47): The name 'Area' does not exist in the current context

using System;

public class Program
{
static public void CalculateArea(int Height, int Base) //function header
{
int Area = Height * Base / 2;
Console.WriteLine("Area of Triangle = {0}", Area);
}

public void Validation(int Height, int Base, int Area)
{
}

static public void Main(string[] args)
{
int a = Int32.Parse(args[0]);
int b = Int32.Parse(args[1]);
Console.WriteLine("Triangle Area Calculator");
CalculateArea(a, b); //function call
Console.WriteLine("Program Complete");
}
}
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Run-time exception (line 17): Object reference not set to an instance of an object.

Stack Trace:

[System.NullReferenceException: Object reference not set to an instance of an object.]
at Program.Main(String[] args) :line 17

+2
Satish Kumar Vadlavalli8y ago
2. using System;
3. public class Program
4. {
5. public int CalculateArea() //function header
6. {
7. Console.Write("Enter Height: ");
8. Height = int.Parse(Console.ReadLine());
9. Console.Write("Enter Base: ");
10. Base = int.Parse(Console.ReadLine());
11. Area = Height * Base / 2;
12. return Area;
13. }
14. public void Validation(int Height, int Base, int Area){
15. }
16. public void Main(string[] args)
17. {
18. Console.WriteLine("Triangle Area Calculator");
19. int Area = CalculateArea(); //function call
20. Console.WriteLine("Area of Triangle = {0}", Area);
21. Console.WriteLine("Program Complete");
22. }
23. }
is this something you are expecting?
+2

Ravi Sangtani8y ago

Hi Mal Coppo

you can try this

class Program

{

static public void CalculateArea(int Height, int Base) //function header

{

int Area = Height * Base / 2;

Console.WriteLine("Area of Triangle = {0}", Area);

}

public void Validation(int Height, int Base, int Area)

{

}

static public void Main(string[] args)

{

int a = Int32.Parse(args[0]);

int b = Int32.Parse(args[1]);

Console.WriteLine("Triangle Area Calculator");

CalculateArea(a,b); //function call

Console.WriteLine("Program Complete");

}

After open command promp where your application is and then write this.

CL is application name