Hydrogen to Calcium in Binary

speakingintongues.cpp

// Online C++ compiler to run C++ program online
#include <iostream>
using namespace std;

int decToBinary(int n)
{
    // array to store binary number
    int binaryNum[32];

    // counter for binary array
    int i = 0;
    while (n > 0) {

        // storing remainder in binary array
        binaryNum[i] = n % 2;
        n = n / 2;
        i++;
    }

    // printing binary array in reverse order
    int binaryValue = 0;
    for (int j = i - 1; j >= 0; j--)
        binaryValue = binaryValue * 10 + binaryNum[j];
        
    return binaryValue;
}

int main() {

   int n = 0;
   for(int i=1;i<=20;i++)
   {
       
       cout<<decToBinary(i);
       
       if(i==1)
   	   cout<<decToBinary(i);
       else if(i==4||i==8||i==17||i==19)
       cout<<decToBinary(i*2)+1;
       else if(i==18)
       cout<<decToBinary((i+1)*2)+1;
       else cout<<decToBinary(i*2);
       if(i!=20) cout<<"-";
   }

    return 0;
}