09.01.2013, 22:56
Do note that this only works for one digit numbers (0 - 9), as you're just changing the ASCII code of the character. The ASCII ID of '0' is 48, the ID of '3' is 51. So that makes '0' + 3 work. But when you do '0' + 10, it will go to the next character on the ASCII table, which is ':' (the colon). 
See the full ASCII table here. (Scroll down a bit)

See the full ASCII table here. (Scroll down a bit)


