int and char conversion

http://stackoverflow.com/questions/1114741/how-to-convert-int-to-char-c

Are you looking for the char equivalent of a single digit number? For example, converting 5 to '5'? If so then you can do the following, assuming of course the char is 9 or less.

char dig = (char)(((int)'0')+i);

http://stackoverflow.com/questions/5029840/convert-char-to-int-in-c-and-c

Depends on what you want to do:

to read the value as an ascii code, you can write

char a = 'a';
int ia = (int)a; 
/* note that the int cast is not necessary -- int ia = a would suffice */

to convert the character '0' -> 0, '1' -> 1, etc, you can write

char a = '4';
int ia = a - '0';
/* check here if ia is bounded by 0 and 9 */