CalculateArea(int option) using interface in C#

How do I solve this conundrum?
I am new to C#, and I am completely lost. This is my homework but I can't figure out how to deal with the missing script/ parts of the following interface:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Calculate_Area {
class Program {

///

///
///

///
static void CalculateArea(int option) {
if (option == 1) {
CircleArea();
} else if (option == 2) {
RectangleArea();
} else {
CylinderArea();
}//end if else
}//end CalculateArea

///

/// Inputs user choice
///

/// 1,2, 3 or 0
static int ReadMenuOption() {

int option = 0;
bool validMenuOption = false;
do {
option = int.Parse(Console.ReadLine());
if ((option >= 0) && (option <= 3)) {
validMenuOption = true;
} else {
Console.WriteLine("\n\t Option must be 1, 2, 3 or 0");
DisplayMenu();
} //end if
} while (!validMenuOption);
return option;
} //end ReadMenuOption

///

/// Display shape menu
///

static void DisplayMenu() {
string menu = "\n 1) Circle"
+ "\n 2) Rectangle"
+ "\n 3) Cylinder (closed)"
+ "\n\nEnter your choice(1, 2, 3 or 0 to exit):";
Console.Write(menu);
} //end DisplayMenu
static void Main() {
int menuOption;
DisplayMenu();
menuOption = ReadMenuOption();
if (menuOption != 0) {
CalculateArea(menuOption);
}// end if
Console.ReadKey();
}
}
}

All you need to do is to write methods to input the information you need and then calculate/display the areas of a circle, rectangle or cylinder using the well known formulas for these:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Calculate_Area {

class Program {

///

/// Inputs radius of circle

/// Calculates and displays area of circle

///

static void CircleArea() {

Console.Write("\n Enter radius of circle : ");

double radius = double.Parse(Console.ReadLine());

double area = Math.PI * radius * radius;

Console.WriteLine(" Area of circle is : " + area);

}

///

/// Inputs height and width of rectangle

/// Calculates and displays area of rectangle

///

static void RectangleArea() {

Console.Write("\n Enter height of rectangle : ");

double height = double.Parse(Console.ReadLine());

Console.Write(" Enter width of rectangle : ");

double width = double.Parse(Console.ReadLine());

double area = height * width;

Console.WriteLine(" Area of rectangle is : " + area);

}

///

/// Inputs height and radius of cylinder

/// Calculates and displays area of cylinder

///

static void CylinderArea() {

Console.Write("\n Enter height of cylinder : ");

double height = double.Parse(Console.ReadLine());

Console.Write(" Enter radius of rectangle : ");

double radius = double.Parse(Console.ReadLine());

double area = 2.0 * Math.PI * radius * ( height + radius);

Console.WriteLine(" Area of cylinder is : " + area);

}

///

static void CalculateArea(int option) {

if (option == 1) {

CircleArea();

} else if (option == 2) {

RectangleArea();

} else {

CylinderArea();

}//end if else

}//end CalculateArea

///

/// Inputs user choice

///

/// 1,2, 3 or 0

static int ReadMenuOption() {

int option = 0;

bool validMenuOption = false;

do {

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

if ((option >= 0) && (option <= 3)) {

validMenuOption = true;

} else {

Console.WriteLine("\n\t Option must be 1, 2, 3 or 0");

DisplayMenu();

} //end if

} while (!validMenuOption);

return option;

} //end ReadMenuOption

///

/// Display shape menu

///

static void DisplayMenu() {

string menu = "\n 1) Circle"

+ "\n 2) Rectangle"

+ "\n 3) Cylinder (closed)"

+ "\n\nEnter your choice(1, 2, 3 or 0 to exit):";

Console.Write(menu);

} //end DisplayMenu

static void Main() {

int menuOption;

DisplayMenu();

menuOption = ReadMenuOption();

if (menuOption != 0) {

CalculateArea(menuOption);

}// end if

Console.ReadKey();

}

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Mohammed Musoke11y ago
Thanks a lot Vulpes
Vulpes11y ago
All you need to do is to write methods to input the information you need and then calculate/display the areas of a circle, rectangle or cylinder using the well known formulas for these:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Calculate_Area {
class Program {

///
/// Inputs radius of circle
/// Calculates and displays area of circle
///
static void CircleArea() {
Console.Write("\n Enter radius of circle : ");
double radius = double.Parse(Console.ReadLine());
double area = Math.PI * radius * radius;
Console.WriteLine(" Area of circle is : " + area);
}

///
/// Inputs height and width of rectangle
/// Calculates and displays area of rectangle
///
static void RectangleArea() {
Console.Write("\n Enter height of rectangle : ");
double height = double.Parse(Console.ReadLine());
Console.Write(" Enter width of rectangle : ");
double width = double.Parse(Console.ReadLine());
double area = height * width;
Console.WriteLine(" Area of rectangle is : " + area);
}

///
/// Inputs height and radius of cylinder
/// Calculates and displays area of cylinder
///
static void CylinderArea() {
Console.Write("\n Enter height of cylinder : ");
double height = double.Parse(Console.ReadLine());
Console.Write(" Enter radius of rectangle : ");
double radius = double.Parse(Console.ReadLine());
double area = 2.0 * Math.PI * radius * ( height + radius);
Console.WriteLine(" Area of cylinder is : " + area);
}

///
///
///
///
static void CalculateArea(int option) {
if (option == 1) {
CircleArea();
} else if (option == 2) {
RectangleArea();
} else {
CylinderArea();
}//end if else
}//end CalculateArea

///
/// Inputs user choice
///
/// 1,2, 3 or 0
static int ReadMenuOption() {
int option = 0;
bool validMenuOption = false;
do {
option = int.Parse(Console.ReadLine());
if ((option >= 0) && (option <= 3)) {
validMenuOption = true;
} else {
Console.WriteLine("\n\t Option must be 1, 2, 3 or 0");
DisplayMenu();
} //end if
} while (!validMenuOption);
return option;
} //end ReadMenuOption

///
/// Display shape menu
///
static void DisplayMenu() {
string menu = "\n 1) Circle"
+ "\n 2) Rectangle"
+ "\n 3) Cylinder (closed)"
+ "\n\nEnter your choice(1, 2, 3 or 0 to exit):";
Console.Write(menu);
} //end DisplayMenu

static void Main() {
int menuOption;
DisplayMenu();
menuOption = ReadMenuOption();
if (menuOption != 0) {
CalculateArea(menuOption);
}// end if
Console.ReadKey();
}
}
}