Question

My 15 year old little brother is starting out programming, and he wrote a neat little program that outputs all combination of letters and numbers that are six digits or less. His code was a sextuple-nested for loop that updated the elements of a six level char array. It looked bad, but was certainly fast! I showed him how to do a simple count, and convert those numbers to base 36.

The biggest problem is that my code was so much slower than his, due to the division I was doing. Is there a way that I can simply assume base 36 and output a count from 1 to 36^6?

Ideally, I’m looking to do something like

[base 36]
for(int i = 0; i < 1000000; i++)
   SaveForLaterFileOutput(i);

Answer 1

Try this:

char buffer[1024];
for(int i = 0; i < 1000000; i++)
      cout << itoa ( i, buffer, 36);

Here it is without itoa (if you don’t have it)

cout << setbase (36);
for(int i = 0; i < 1000000; i++)
      cout << i << endl;
cout << setbase (10); // if you intend to keep using cout