- C++ Programming Examples
- C++ Programming Examples
- C++: Hello World
- C++: Get Input
- C++: Print Integer
- C++: Add two numbers
- C++: Add, Sub, Multiply, Div
- C++: Add Digits
- C++: Find Average and Percentage
- C++: Find Arithmetic Mean
- C++: Sum of n Natural Numbers
- C++: Sum of n Numbers
- C++: Square's Area and Perimeter
- C++: Rectangle's Area and Perimeter
- C++: Triangle's Area and Perimeter
- C++: Area and Circumference
- C++: Find Simple Interest
- C++: Fahrenheit to Celsius
- C++: Celsius to Fahrenheit
- C++: Print Prime Numbers
- C++: Reverse a Number
- C++: Swap Two Numbers
- C++: Print Multiplication Table
- C++: Find Factorial of a Number
- C++: Find Factors of a Number
- C++: Find HCF and LCM
- C++: Create a Calculator
- C++: Count Digits in a Number
- C++: First and Last Digit Sum
- C++: Product of Number Digits
- C++: Sum of Squares of Digits
- C++: Interchange Digits of Number
- C++ if-else Programs
- C++: Check Even or Odd
- C++: Check Prime or Not
- C++: Check Alphabet or Not
- C++: Check Vowel or Not
- C++: Check Leap Year or Not
- C++: Check Reverse equals Original
- C++: Check Perfect Number
- C++: Check Palindrome or Not
- C++: Check Armstrong or Not
- C++: Divisibility Test
- C++: Find Labor Wage
- C++: Find Discounted Price
- C++: Find Shipping Charge
- C++: Find Telephone Bills
- C++: Calculate Student Grade
- C++: Largest of Two Numbers
- C++: Largest of Three Numbers
- C++ Number Conversion
- C++: Decimal to Binary
- C++: Decimal to Octal
- C++: Decimal to Hexadecimal
- C++: Binary to Decimal
- C++: Binary to Octal
- C++: Binary to Hexadecimal
- C++: Octal to Decimal
- C++: Octal to Binary
- C++: Octal to Hexadecimal
- C++: Hexadecimal to Decimal
- C++: Hexadecimal to Binary
- C++: Hexadecimal to Octal
- C++ Pattern Programs
- C++: Pattern Programs
- C++: Print Diamond Pattern
- C++: Print Floyd's Triangle
- C++: Print Pascal's Triangle
- C++ Array Programs
- C++: 1D Array Program
- C++: Linear Search
- C++: Binary Search
- C++: Largest Element in an Array
- C++: Smallest Element in an Array
- C++: Find Second Largest Element
- C++: Find Second Smallest Element
- C++: Sum of All Elements
- C++: Multiply All Elements
- C++: Element in Even Position
- C++: Element in Odd Position
- C++: Print Even Numbers in Array
- C++: Print Odd Numbers in Array
- C++: Count Even or Odd Numbers
- C++: Sum of Even or Odd Numbers
- C++: Count Positive, Negative, Zero
- C++: Reverse an Array
- C++: Insert an Element
- C++: Delete an Element
- C++: Merge two Arrays
- C++: Bubble Sort
- C++: Selection Sort
- C++: Insertion Sort
- C++: Common Elements
- C++: 2D Array Programs
- C++: Add Two Matrices
- C++: Subtract Two Matrices
- C++: Transpose Matrix
- C++: Multiply Two Matrices
- C++: 3D Array Programs
- C++ String Programs
- C++: Print String
- C++: Find String Length
- C++: Compare Two Strings
- C++: Copy String
- C++: String Concatenation
- C++: Reverse a String
- C++: Delete Vowels from a String
- C++: Delete a Word from a String
- C++: Count Characters in a String
- C++: Count Words in a String
- C++: Frequency of Words
- C++: Remove Spaces from Strings
- C++: Sort a String
- C++: Uppercase to Lowercase
- C++: Lowercase to Uppercase
- C++: Swap Two Strings
- C++: Check the Anagram or Not
- C++: Capitalize All Words in a String
- C++: Get Numbers from a String
- C++ File Programs
- C++: Read a File
- C++: Write Content to a File
- C++: Append Data to a File
- C++: Read and Display File
- C++: Copy a File
- C++: Merge Two Files
- Count Characters in a File
- C++: Capitalize Every Word
- C++: List Files in Directory
- C++: Delete a File
- C++: Encrypt and Decrypt a File
- C++ Misc Programs
- C++: Print ASCII Value
- C++: Add Binary Numbers
- C++: Generate Random Numbers
- C++: Print a Smiling Face
- C++: Days into Years and Months
- C++: Add Two Numbers using Pointer
- C++: Print Fibonacci Series
- C++: Generate Armstrong Numbers
- C++: Find nCr and nPr
- C++: Get IP Address
- C++: Print Date and Time
- C++: Shutdown and Restart Computer
- C++ Programming Tutorial
- C++ Tutorial
C++ Program to Find the Area and Perimeter of a Square
In this article, you will learn and get code for finding the area and perimeter of a square in C++ programming. Here is the list of approaches used to create the program:
- Without using a function, calculate the area of a square
- Area of a Square using Function
- Without using a function, calculate the perimeter of a square
- Find the perimeter of a square using a function
- Area and perimeter of a square using class and object
Before starting the program, let's first see the formula to calculate the area and perimeter of a square.
Area of a Square Formula
To find the area of a square, use the following formula:
area = len*len
len indicates the length of the square. Because all the sides of a square are the same length, take the length of each side and square it.That will be the area.
Square Perimeter Formula
Use the following formula to calculate the perimeter of a square:
perimeter = 4*len
len indicates length. Now let's move on to the program.
In C++, calculate the area of a square
To calculate the area of a square in C++ programming, you have to ask the user to enter the side length of the square. With this side length, apply the formula as given above and initialize its value to a variable say area and print its value as output as shown here in the following program.
#include<iostream> using namespace std; int main() { float len, area; cout<<"Enter the Length of Square: "; cin>>len; area = len*len; cout<<"\nArea = "<<area; cout<<endl; return 0; }
This program was built and runs under the Code::Blocks IDE. Here is the initial snapshot of the sample run:
Now enter the value of the length of a square, say 5, to find its area as shown in the final snapshot of the sample run given below:
Find the Area of a Square in C++ Using a Function
This program does the same job as the previous one. The only difference is that this program finds the area of a square using a user-defined function named areaOfSquare(). It takes the length of the square as its argument and returns the area value of the square based on the length value passed as its argument.
#include<iostream> using namespace std; float areaOfSquare(float); int main() { float len, area; cout<<"Enter the Length of Square: "; cin>>len; area = areaOfSquare(len); cout<<"\nArea = "<<area; cout<<endl; return 0; } float areaOfSquare(float len) { return (len*len); }
This program will produce the same output as the previous one.
In C++, find the perimeter of a square
Now let's create a program to find the perimeter of a square without using any functions.
#include<iostream> using namespace std; int main() { float len, per; cout<<"Enter the Length of Square: "; cin>>len; per = 4*len; cout<<"\nPerimeter = "<<per; cout<<endl; return 0; }
Here is its sample run:
Supply the length of any side of the square to find and print its perimeter, as shown in the following snapshot:
Find the perimeter of a square in C++ using a function
This program also does the same job as the previous one. It uses a function named perOfSquare() that calculates the perimeter of a square based on the length passed as its argument.
#include<iostream> using namespace std; float perOfSquare(float); int main() { float len; cout<<"Enter the Length of Square: "; cin>>len; cout<<"\nPerimeter = "<<perOfSquare(len); cout<<endl; return 0; } float perOfSquare(float len) { return (4*len); }
In C++, find the area and perimeter of a square using the class
This program finds both the area and perimeter of a square using a class and an object.
#include<iostream> using namespace std; class CodesCracker { private: float len; public: void getData(); float findArea(); float findPerimeter(); }; void CodesCracker::getData() { cout<<"Enter the Length of Square: "; cin>>len; } float CodesCracker::findArea() { return (len*len); } float CodesCracker::findPerimeter() { return (4*len); } int main() { CodesCracker c; float area, per; c.getData(); area = c.findArea(); per = c.findPerimeter(); cout<<"\nArea = "<<area; cout<<"\nPerimeter = "<<per; cout<<endl; return 0; }
Here's an example run with user input of 5:
The same program in different languages
- C Calculate Area, Perimeter
- Java Calculate Area, Perimeter
- Python Calculate Area, of Square
- Python Calculate Perimeter of Square
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