pls help me to solve this geometry calculator pls use normal method pls don't use switch structure

Question

Geometry Calculator

Write a program that displays the following menu:

Geometry Calculator

1. Calculate the Area of a Circle

2. Calculate the Area of a Rectangle

3. Calculate the Area of a Triangle

4. Quit

Enter your choice (1-4):

Answer 1

why no switch structure ?

switch is the best thing you can use for a console menu

here is my solution with switch:

#include <iostream>

using namespace std;

int main()
{
    int Menu;
    double pi = 3.14159265;
    double A, r, h, g, a, b;
    
    do{
        
        
        cout << "\nChoose an option: ";
        cin >> Menu;
        
        switch(Menu){
            
            case 1:
                cout << "\nCalculate the Area of a circle";
                cout << "\nType in the value for r: ";
                cin >> r;
                A = r * r * pi;
                cout << "The Area of the circle is: " << A;
                break;
                
            case 2:
                cout << "\nCalculate the Area of a rectangle: ";
                cout << "\nType in the value of a: ";
                cin >> a;
                cout << "Type in the value of b: ";
                cin >> b;
                A = a * b;
                cout << "The Area of the rectangle is: " << A;
                break;
                
            case 3:
                cout << "\nCalculate the Area of a Triangle: ";
                cout << "\nType in the value for the height h: ";
                cin >> h;
                cout << "Type in the value for g: ";
                cin >> g;
                A = 0.5 * g * h;
                cout << "The Area of the triangle is: " << A;
                break;
                
            case 4:
                cout << "\nThe End!";
                break;
                
            default:
                cout << "Error! Not a valid option!";
                break;
        }
        
    }while(Menu != 4);

    return 0;
}

if you dont want to use switch just do it with if statements for example:

if(Menu == 1){

    cout << "Area of a circle";

}

Comments

pls help me and do it

---

hahhaaha you should learn to do things like this. this is really basic stuff that you can easily learn in a week at most...
well here is the solution:

#include <iostream>

using namespace std;

int main()
{
    int Menu;
    double pi = 3.14159265;
    double A, r, h, g, a, b;
    // A = Area
    // r = radius
    // h = height
    // g = baseline of the Triangle
    // a = 1st side of the Rectangle
    // b = 2nd side of the Rectangle
    
    do{
        
        
        cout << "\nChoose an option: ";
        cout << "\n***********************";
        cout << "\n**** 1 = Circle    ****";
        cout << "\n**** 2 = Rectangle ****";
        cout << "\n**** 3 = Triangle  ****";
        cout << "\n**** 4 = End       ****";
        cout << "\n***********************" << endl;
        cin >> Menu;
        
        if(Menu == 1){
            cout << "\nCalculate the Area of a circle";
            cout << "\nType in the value for r: ";
            cin >> r;
            A = r * r * pi;
            cout << "The Area of the circle is: " << A;
        }
                
        if(Menu == 2){
            cout << "\nCalculate the Area of a rectangle: ";
            cout << "\nType in the value of a: ";
            cin >> a;
            cout << "Type in the value of b: ";
            cin >> b;
            A = a * b;
            cout << "The Area of the rectangle is: " << A;
        }
                
        if(Menu == 3){
            cout << "\nCalculate the Area of a Triangle: ";
            cout << "\nType in the value for the height h: ";
            cin >> h;
            cout << "Type in the value for g: ";
            cin >> g;
            A = 0.5 * g * h;
            cout << "The Area of the triangle is: " << A;
        }
                
        if(Menu == 4){
            cout << "\nThe End!";
        }    
        
        if(Menu > 4){
            cout << "Error! Not a valid option!";
        }
        
    }while(Menu != 4);

    return 0;
}

---

tanx alot mr moha pls can you explain it step by step

---

#include <iostream>
//-> including the standard libraries

using namespace std;
//-> this is useful for beginners you dont need to write std:: e.g.: std::cout<<" ";



int main()  //-> this is where your main function starts all your code goes inside of it you will learn more about functions as you progress
{
    int Menu;                   //Variable for the Menu
    double pi = 3.14159265;     //Variable for pi
    double A, r, h, g, a, b;
    // Variable for:
    // A = Area
    // r = radius
    // h = height
    // g = baseline of the Triangle
    // a = 1st side of the Rectangle
    // b = 2nd side of the Rectangle
    
    do{             //-> this starts a loop as long as the user doesnt input 4 for the variable Menu it will always stay in this loop see the while statement at the end
        
        //cout is printing the following lines to the console window
        cout << "\nChoose an option: ";
        cout << "";
        cout << " 1 = Circle";
        cout << " 2 = Rectangle ";
        cout << " 3 = Triangle  ";
        cout << " 4 = End       ";
        cout << "" << endl;
        cin >> Menu;        //cin reads an input from the console to a variable (here the Variable is Menu)
        
        if(Menu == 1){
            //if Variable Menu has the Value 1 (if the user inputs 1), it will run the following code:
            cout << "\nCalculate the Area of a circle";
            cout << "\nType in the value for r: ";
            cin >> r;
            A = r * r * pi;
            cout << "The Area of the circle is: " << A;
            //Calculates the Area of a circle and prints the result onto the screen
        }
                
        if(Menu == 2){
            //if Variable Menu has the Value 2 (if the user inputs 2), it will run the following code:
            cout << "\nCalculate the Area of a rectangle: ";
            cout << "\nType in the value of a: ";
            cin >> a;
            cout << "Type in the value of b: ";
            cin >> b;
            A = a * b;
            cout << "The Area of the rectangle is: " << A;
            //Calculates the Area of a rectangle and prints the result onto the screen
        }
                
        if(Menu == 3){
            //if Variable Menu has the Value 3 (if the user inputs 3), it will run the following code:
            cout << "\nCalculate the Area of a Triangle: ";
            cout << "\nType in the value for the height h: ";
            cin >> h;
            cout << "Type in the value for g: ";
            cin >> g;
            A = 0.5 * g * h;
            cout << "The Area of the triangle is: " << A;
            //Calculates the Area of a triangle and prints the result onto the screen
        }
                
        if(Menu == 4){
            //if Variable Menu has the Value 4 (if the user inputs 4), it will run the following code:
            cout << "\nThe End!";
            //Prints The End to the Screen
        }    
        
        if(Menu > 4){
            //if Variable Menu is bigger than 4 (if the user inputs something bigger than 4), it will run the following code:
            cout << "Error! Not a valid option!";
            //this part is basic error handling
        }
        
    }while(Menu != 4);
    //the code in the do{}while(); will run as long as the user doenst input the value 4 for the Variable Menu

    return 0;
}