C++ program to calculate the area and perimeter of the square

You will learn about C++ program to calculate the area of square using a function and without function.

For the better understanding of this program you have to know more about the following C++ programming topic(s) :

C++ function

 

 The formula is to calculate the area of a square is:

Area = (side length) * (side length) 

Example#1.0: C++ program to calculate the area and perimeter  of square without function:

	#include <iostream>
	using namespace std;
	int main()
	{
	float l, a, p;
	cout << "Enter the side lenght of square\n";
	cin >> l;
	a = l * l;
	p = 4.0 * l;
	cout << "Area of Square is \t\t" << a << endl;
	cout << "Perimeter of Square is \t" << p << endl;
	return 0;
	}

view raw area-of-square.cpp hosted with ❤ by GitHub

Output

Enter the side lenght of square
25.5
Area of Square is               650.25
Perimeter of Square is          102

 

Example#1.1: C++ program to calculate the area and perimeter of square using function:

	#include <iostream>
	using namespace std;
	//function prototype
	float squareArea(float l);
	float squarePerimeter(float l);
	//function main begins program execution
	int main()
	{
	float l;
	cout << "Enter the side lenght of square\n";
	cin >> l;
	cout << "Area of Square is \t\t" << squareArea(l) << endl;
	cout << "Perimeter of Square is \t" << squarePerimeter(l) << endl;
	//function call
	return 0;
	}
	//implementation of squareArea function
	float squareArea(float l)
	{
	return (l * l);
	}
	//implementation of squarePerimeter function
	float squarePerimeter(float l)
	{
	return (4.0 * l);
	}

view raw area-of-square-function.cpp hosted with ❤ by GitHub

Output

 Enter the side lenght of square
25.5
Area of Square is               650.25
Perimeter of Square is          102

Press Enter to return to Quincy...