- 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 sum of even and odd numbers
This article provides some programs in C++ that find and print the sum of all even and odd numbers from a list of some random numbers entered by the user. The program is created in the following two ways:
- Find the sum of even and odd numbers using a for loop
- Find the sum of even and odd numbers using the while loop
Using a for loop, find the sum of even and odd numbers
The question is, "Write a C++ program that receives 10 numbers from the user and prints the sum of all even and all odd numbers." The program given below is its answer:
#include<iostream> using namespace std; int main() { int arr[10], i, eve=0, odd=0; cout<<"Enter any 10 numbers: "; for(i=0; i<10; i++) cin>>arr[i]; for(i=0; i<10; i++) { if(arr[i]%2==0) eve = eve+arr[i]; else odd = odd+arr[i]; } cout<<"\nSum of Even Numbers = "<<eve; cout<<"\nSum of Odd Numbers = "<<odd; cout<<endl; return 0; }
This snapshot shows the initial output produced by the above C++ program on finding the sum of even and odd numbers from a given array:
Now supply the input, say 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 as ten numbers for the array, and then press the ENTER key to find and print the sum of even and odd numbers from all these given 10 numbers, as shown in the snapshot given below:
Modified Version of the Previous Program
This is a modified version of the previous program that allows the user to specify the array's size as well as the array's elements, or numbers. Also, this program included some messages to print when no even or odd number was found in the given list of numbers.
#include<iostream> using namespace std; int main() { int n, i, eve=0, odd=0; cout<<"Enter the size of array: "; cin>>n; int arr[n]; cout<<"Enter any "<<n<<" numbers: "; for(i=0; i<n; i++) { cin>>arr[i]; if(arr[i]%2==0) eve += arr[i]; else odd += arr[i]; } if(eve==0) cout<<"\nEven number not found!"; else cout<<"\nSum of Even Numbers = "<<eve; if(odd==0) cout<<"\nOdd number not found!"; else cout<<"\nSum of Odd Numbers = "<<odd; cout<<endl; return 0; }
Here is its sample run with user input of 4 as size and 1, 3, 5, 7 as four numbers:
In the above program, the statement is:
eve += arr[i];
is the same as
eve = eve + arr[i];
Using a while loop, find the sum of even and odd numbers
This is the last program of this article, created using the while loop. Because the while loop lacks initialization and update statements. Therefore, we need to do initialization before the loop and an update statement in the body of the loop, as shown in the program given here:
#include<iostream> using namespace std; int main() { int n, i=0, eve=0, odd=0; cout<<"Enter the size of array: "; cin>>n; int arr[n]; cout<<"Enter any "<<n<<" numbers: "; while(i<n) { cin>>arr[i]; if(arr[i]%2==0) eve += arr[i]; else odd += arr[i]; i++; } if(eve==0) cout<<"\nEven number not found!"; else cout<<"\nSum of Even Numbers = "<<eve; if(odd==0) cout<<"\nOdd number not found!"; else cout<<"\nSum of Odd Numbers = "<<odd; cout<<endl; return 0; }
This program produces the same output as the previous program.
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