Application of character and integer

Char A = '0 ';Printf ("% d", );Get 48

Char A = '0 ';Printf ("% C", );Returns 0.

Int A = '0 '; Printf ("% d", );Get 48 int A = '0 '; Printf ("% C", );The storage of 0 is irrelevant to the type. Whether it is Char or Int, it is only related to the output form. Generally, it is easier to use char-type storage, but it is generally processed by '0' reduction, because it will be equivalent to the calculation of Arabic numbers 1-9 in the future, rather than the calculation of ASC code, use a <8 rather than a <'8' for determination'