C++ Exercises: Convert a decimal number to binary number

C++ For Loop: Exercise-70 with Solution

Write a program in C++ to convert a decimal number to a binary number.

Pictorial Presentation:

Sample Solution:-

C++ Code :

#include <iostream>
#include <math.h>
using namespace std;
 
int main()
{
        int dec_num, rem, quot, i=1, j;
        int bin_num[100];

		cout << "\n\n Convert a decimal number to binary number:\n";
	cout << "---------------------------------------------------\n";
	cout << " Input a decimal number: ";
	cin>> dec_num;
        quot = dec_num;
        while(quot != 0)
        {
            bin_num[i++] = quot%2;
            quot = quot/2;
        }
        cout<<" The binary number is: ";
        for(j=i-1; j>0; j--)
        {
            cout<<bin_num[j];
        }
   cout<<("\n");  
 }  

Sample Output:

 Convert a decimal number to binary number:                            
---------------------------------------------------                    
 Input a decimal number: 35                                            
 The binary number is: 100011

Flowchart:

C++ Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a program in C++ to produce a square matrix with 0's down the main diagonal, 1's in the entries just above and below the main diagonal, 2's above and below that, etc.
Next: Write a program in C++ to convert a decimal number to hexadecimal number.