Thanks, Corona and Don.
Don, while i was reading ur reply to figure out my mistake, i realize tat i<100 was juz a typo, i wanted to set it i<10. Btw, thanks for tis new lesson
I wont quit programming, i feel it is fun to solve problem.
Corona, so i hav check out tis ASCII character set, yea i found tat 1st 16 character of ASCII character r non printable control characters. I wonder if 0 = 0, 1 = 1, 2 =2 and so forth, and '0' = 48, why will it bcome 1 when we minus '1' - '0' and not a non printable control characters? If we add '0' to 1, will it bcome bak '1' or as u said '0' = 48 and bcome 49?? How do dey differentiate it is a character set or an integer??
Sorry everyone who r trying to reply me. I feel tat im annoying, i hope tat u all don mind to answer my question