﻿ C++ Exercises: Add two binary numbers - w3resource

# C++ Exercises: Add two binary numbers

## C++ Basic: Exercise-60 with Solution

Write a C++ program to add two binary numbers.

Visual Presentation:

Sample Solution:

C++ Code :

``````#include <iostream> // Including input-output stream header file
#include <math.h>   // Including math functions header file
using namespace std; // Using the standard namespace

int main() { // Start of the main function
long bn1, bn2; // Declaration of variables to store binary numbers
int i = 0, r = 0; // Initializing variables for iteration and remainder
int sum[20]; // Array to store the sum of binary digits

cout << "\n\n Addition of two binary numbers:\n"; // Displaying the purpose of the program
cout << "-----------------------------------\n";
cout << " Input the 1st binary number: ";
cin >> bn1; // Taking input for the first binary number
cout << " Input the 2nd binary number: ";
cin >> bn2; // Taking input for the second binary number

// Loop to add binary digits
while (bn1 != 0 || bn2 != 0) {
// Adding binary digits and remainder, storing the sum
sum[i++] = (int)((bn1 % 10 + bn2 % 10 + r) % 2);
r = (int)((bn1 % 10 + bn2 % 10 + r) / 2);
bn1 = bn1 / 10; // Moving to the next digit in the first binary number
bn2 = bn2 / 10; // Moving to the next digit in the second binary number
}

if (r != 0) { // Checking if there's a remaining carry
sum[i++] = r; // Adding the remaining carry to the sum
}

--i; // Decrementing the index to reach the end of the sum array

cout << " The sum of two binary numbers is: ";
while (i >= 0) { // Loop to print the sum of binary numbers
cout << (sum[i--]); // Printing each digit of the sum
}
cout << ("\n");
return 0; // Returning 0 to indicate successful program execution
}
``````

Sample Output:

``` Addition of two binay numbers:
-----------------------------------
Input the 1st binary number: 1010
Input the 2nd binary number: 0011
The sum of two binary numbers is: 1101
```

Flowchart:

C++ Code Editor:

What is the difficulty level of this exercise?

﻿