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Assistance with Functions

Nyarxu (2)
I need help with my functions and probably my ifs. I shouldn't have outputs in my functions but I don't know how to execute that. This program gives the choice of finding the area and perimeter of either a circle, triangle, and rectangle.

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#include <iostream>
#include <cmath>

using namespace std;

double pi = 3.14;

void areaRectangle()
{
	double length;
	double width;

	cout << "What is your length and width: (Area) " << endl;
	cin >> length >> width;

	double area = length * width;

	cout << "The area of the rectangle is: " << area << endl;
}

void perimeterRectangle()
{
	double length;
	double width;

	cout << "What is your length and width: (Perimeter) " << endl;
	cin >> length >> width;

	double perimeter = 2 * length + 2 * width;

	cout << "The perimeter area of the rectangle is: " << perimeter << endl;
}

void areaTriangle()
{
	double base;
	double height;

	cout << "What is your base and height measurements: (Area) " << endl;
	cin >> base >> height;

	double area = base * height / 2;

	cout << "The area of the triangle is: " << area << endl;
}
    
    //@param: length1 is the first length of the triangle
	//@param: length2 is the second length of the triangle
	//@param: length3 is the third length of the triangle
void perimeterTriangle()
{
	double length1; 
	double length2; 
	double length3;
	
	cout << "What is the length of your three sides: (Perimeter) " << endl;
	cin >> length1 >> length2 >> length3;

	double perimeter = length1 + length2 + length3;
	
	cout << "The perimeter of your triangle is: " << perimeter << endl;


}
   
void areaCircle()
{
	double radius;

	cout << "What is your radius: (Area) " << endl;
	cin >> radius;

	double circumference = 2 * pi * radius;
	double area = pi * radius * radius;

	cout << "Your circumference is " << circumference << " and your area is " << area << endl;
}

int main()
{
	cout << "Which shape do you want to know the area and perimeter of? (circle = 1, rectangle = 2, triangle = 3)" << endl;
	int shapeChoice;
	cin >> shapeChoice;

	if (shapeChoice == 1)
	{
		areaCircle();
	}
	else if (shapeChoice == 2)
	{
		areaRectangle();
		perimeterRectangle();
	}
	else (shapeChoice == 3);
	{
		areaTriangle();
		perimeterTriangle();
	}
	

	return 0;
}
closed account (48T7M4Gy)
Try this:

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[code]int areaRectangle(int length, int width)
{
    return length * width;
}

and ...

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int main()
{
   cout << areaRectangle( 6, 5) << endl;

   int len= 2;
   int wid= 7;
   cout << areaRectangle( len, wid ) << endl;

   return 0;
}

Last edited on
closed account (48T7M4Gy)
and this ...

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if (shapeChoice == 1)
	{
		cout < areaCircle( 6 );
	}
	else if (shapeChoice == 2)
	{
		cout << areaRectangle( 2, 78);etc ...

if's looked OK except you need to pass parameters to functions and let them return the results to be printed out in main()
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