Question

c语言-已知大写字母A的ascii码是65,

Answer 1

C 67 A 65 Z 90

c 99 a 97 z 122

c='A'+c-'c' 不能

在ascii中大写和小写的ascii值差32

c=c-'Z'+'z' 67 = 67 - 90 + 122 = 99

c=c+32 67 = 67 + 32 = 99

c=c-'A'+'a' 67 = 67 - 65 + 97 = 99

不知道这样写你能不能看明白