what s[i]-'0' does
It seems that s is a character array or a pointer to the first
element of a character array. And element s[i] contains a character
that represents a digit as for example '5' . To convert this character
that for example in ASCII has internal code equal to 53
(while internal code of character '0' is 48) there is used expression
s[i] -'0'
that is equivalent to
53 - 48
and equal to number 5what s[i]-'0' does
'0' - 48
'1' - 49
'2' - 50
'3' - 51
'4' - 52
'5' - 53
'6' - 54
'7' - 55
'8' - 56
'9' - 57Copyright © 2021 Codeinu
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