str[i] - '0'

AndresML answered on November 2, 2020 Popularity 5/10 Helpfulness 1/10

answer str[i] - '0'

str[i] - '0'

Comment

The part str[i] - '0' takes the ASCII character of the corresponding digit 
which are sequentially "0123456789" and subtracts the code for '0' from the 
current character. This leaves a number in the range 0..9 as to which digit is 
in that place in the string.

Popularity 5/10 Helpfulness 1/10 Language cpp

Source: stackoverflow.com

Tags: c++

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