C++ - Decimal to binary converting

Question

I wrote a \'simple\' (it took me 30 minutes) program that converts decimal number to binary. I am SURE that there\'s a lot simpler way so can you show me? Here\'s the code:<

Answer 1

You want to do something like:

cout << "Enter a decimal number: ";
cin >> a1;
cout << setbase(2);
cout << a1