Need help with creating a library

[orange21]

Zero in programming, help to fix a query in chatgpt or implement logic to calculate sides, angles, perimeter and area.

Create a c++ library with trapezoid data and divide it into 3 files. In the file trapezoid.cpp create a user menu with a choice of calculation (by two sides and height, by two diagonals and angle sine, by centre line and height). Make a function to find sides of angles of perimeter and area of a trapezoid. If some data is insufficient, let the programme output "insufficie nt data" at this point. The output should be presented as the values of all sides, angles, perimeter and area.

GPT:
Below is an example of how you might structure a C++ library for trapezoid calculations, divided into three files: `trapezoid.h` (header file), `trapezoid.cpp` (implementation file), and `main.cpp` (file with the `main` function to run the program).

**trapezoid.h**
```cpp
#ifndef TRAPEZOID_H
#define TRAPEZOID_H

class Trapezoid {
private:
double side_a, side_b, side_c, side_d; // Sides
double angle_alpha, angle_beta; // Angles at the base a
double height;
bool sufficientData;

public:
Trapezoid(doubl e a, double b, double h);
void calculateSidesA ndAngles();
void calculatePerime ter();
void calculateArea() ;
void display();
void setData(double a, double b, double h);
void setData(double d1, double d2, double angle);
void setDataByCenter Line(double m, double h);
};

#endif
```

**trapezoid.cpp **
```cpp
#include "trapezoid. h"
#include <iostream>
#include <cmath>

Trapezoid::Trap ezoid(double a, double b, double h) : side_a(a), side_b(b), height(h), sufficientData( true) {
// Initial calculations for sides and angles can be done here if desired
}

void Trapezoid::calc ulateSidesAndAn gles() {
// Implement logic to calculate sides and angles
}

void Trapezoid::calc ulatePerimeter( ) {
// Implement logic to calculate perimeter
}

void Trapezoid::calc ulateArea() {
// Implement logic to calculate area
}

void Trapezoid::disp lay() {
if (!sufficientDat a) {
std::cout << "Insufficie nt data" << std::endl;
return;
}
// Display the values of all sides, angles, perimeter, and area
}

void Trapezoid::setD ata(double a, double b, double h) {
// Set data for two sides and height
}

void Trapezoid::setD ata(double d1, double d2, double angle) {
// Set data for two diagonals and angle sine
}

void Trapezoid::setD ataByCenterLine (double m, double h) {
// Set data by center line and height
}

// User menu implementation
void showMenu() {
Trapezoid trapezoid(0, 0, 0); // Initialize with dummy values
int choice;
std::cout << "Choose calculation type:\n";
std::cout << "1. By two sides and height\n";
std::cout << "2. By two diagonals and angle sine\n";
std::cout << "3. By center line and height\n";
std::cout << "4. Exit\n";
std::cin >> choice;

switch (choice) {
case 1:
// Logic for calculation by two sides and height
break;
case 2:
// Logic for calculation by two diagonals and angle sine
break;
case 3:
// Logic for calculation by center line and height
break;
case 4:
std::cout << "Exiting program." << std::endl;
return;
default:
std::cout << "Invalid choice. Please try again." << std::endl;
showMenu(); // Show the menu again if the choice is invalid
}
}

int main() {
showMenu();
return 0;
}
```

**main.cpp**
```cpp
#include "trapezoid. h"

int main() {
// The main function will interact with the user and utilize the Trapezoid class
// This is where you would call showMenu()
return 0;
}
```

This is a basic structure that you can expand upon. You'll need to implement the logic for calculating the sides, angles, perimeter, and area within the `Trapezoid` class methods. The `showMenu` function will handle user input to select the type of calculation and enter the necessary data. If there is insufficient data, the program will output "insufficie nt data" as specified. Remember to validate the input data before performing calculations.

[developercat]

It seems like this a boilerplate template to your problem from the prompt you asked.

You should then proceed to ask detailed questions for each method.

• How to calculate side in a c++ function
• How to calculate angles in a c++ function
• How to calculate permitter in a c++ function

Use the code provide as the logic to your methods.
Test each method with against results from sample questions to see if you get the right answer.