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Introduction
C "Hello, World!" ProgramPrint an Integer (Entered by the User)Add Two IntegersMultiply Two Floating-Point NumbersFind ASCII Value of a CharacterCompute Quotient and RemainderFind the Size of int, float, double and charSwap Two Numbers
Decision Making and Loops
Check Whether a Number is Even or OddCheck Whether a Character is a Vowel or ConsonantFind the Largest Number Among Three NumbersFind the Roots of a Quadratic EquationCheck Leap YearCheck Whether a Number is Positive or NegativeCheck Whether a Character is an Alphabet or notCalculate the Sum of Natural NumbersFind Factorial of a NumberGenerate Multiplication TableDisplay Fibonacci SequenceFind GCD of two NumbersFind LCM of two NumbersDisplay Characters from A to Z Using LoopCount Number of Digits in an IntegerReverse a NumberCalculate the Power of a NumberCheck Whether a Number is Palindrome or NotCheck Whether a Number is Prime or NotDisplay Prime Numbers Between Two IntervalsCheck Armstrong NumberDisplay Armstrong Number Between Two IntervalsDisplay Factors of a NumberMake a Simple Calculator Using switch...casePrint Pyramids and Patterns
Functions
Demonstrate the Working of Keyword longDisplay Prime Numbers Between Intervals Using FunctionCheck Prime or Armstrong Number Using User-defined FunctionCheck Whether a Number can be Expressed as Sum of Two Prime NumbersFind the Sum of Natural Numbers using RecursionFind Factorial of a Number Using RecursionFind G.C.D Using RecursionConvert Binary Number to Decimal and vice-versaConvert Octal Number to Decimal and vice-versaConvert Binary Number to Octal and vice-versaReverse a Sentence Using Recursioncalculate the power using recursion
Arrays and Pointers
Calculate Average Using ArraysFind Largest Element in an ArrayCalculate Standard DeviationAdd Two Matrices Using Multi-dimensional ArraysMultiply Two Matrices Using Multi-dimensional ArraysFind Transpose of a MatrixMultiply two Matrices by Passing Matrix to a FunctionAccess Array Elements Using PointerC Program Swap Numbers in Cyclic Order Using Call by ReferenceFind Largest Number Using Dynamic Memory Allocation
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Find the Frequency of Characters in a StringCount the Number of Vowels, Consonants and so onRemove all Characters in a String Except AlphabetsFind the Length of a StringConcatenate Two StringsCopy String Without Using strcpy()Sort Elements in Lexicographical Order (Dictionary Order)
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Store Information of a Student Using StructureAdd Two Distances (in inch-feet system) using StructuresAdd Two Complex Numbers by Passing Structure to a FunctionCalculate Difference Between Two Time PeriodsStore Information of Students Using StructureStore Data in Structures Dynamically
File I/O
Write a Sentence to a FileRead the First Line From a FileDisplay its own Source Code as Output

C++ Program to Add Two Numbers

Example: Program to Add Two Integers


              

#include <iostream>
using namespace std;

int main() {

  int first_number, second_number, sum;

  cout << "Enter two integers: ";
  cin >> first_number >> second_number;

  // sum of two numbers in stored in variable sumOfTwoNumbers
  sum = first_number + second_number;

  // prints sum
  cout << first_number << " + " <<  second_number << " = " << sum;

  return 0;
}

Output


              

Enter two integers: 4
5
4 + 5 = 9

In this program, the user is asked to enter two integers. These two integers are stored in variables first_number and second_number respectively.

Then, the variables are added using the + operator and stored in the sum variable.

Finally, sum is displayed on the screen.

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