Convert Decimal to Binary

  • November 17, 2022
  • C++
Accessing Elements

Given a decimal number as input, we need to write a program to convert the given decimal number into an equivalent binary number.

Examples: 

 
Input : 7
Output : 111

Input : 10
Output : 1010

Input: 33
Output: 100001
Algorithm for Converting Decimal to Binary:
  • Step 1: Divide the number by 2 and store the remainder in an array (modulus operator).
  • Step 2: Divide the number by 2 using the formula / (division operator)
  • Step 3: Repeat¬†step 2 until the result is greater than zero.

Program Code:

#include <iostream>
using namespace std;

void decimalToBinary(int n){
	int arr[11], i = 0, num = n;
    
    // Until the value of n becomes 0.
	while(n != 0){
		arr[i] = n % 2;
		i++;
		n = n / 2;
	}
	cout << num << " in Binary is ";

	// Printing the array in Reversed Order.
	for(i = i - 1; i >= 0;i--){
		cout << arr[i];
	}
	cout << endl;
}
int main() {
	int n = 156;
	decimalToBinary(n);

	return 0;
}

Output:

156 in Binary is 10011100

Note: also read about Program To Find the grade of the student

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