std::isalnum
std::isalnum
Defined in header <cctype> | ||
|---|---|---|
int isalnum( int ch ); |
Checks if the given character is an alphanumeric character as classified by the current C locale. In the default locale, the following characters are alphanumeric:
- digits (
0123456789) - uppercase letters (
ABCDEFGHIJKLMNOPQRSTUVWXYZ) - lowercase letters (
abcdefghijklmnopqrstuvwxyz)
The behavior is undefined if the value of ch is not representable as unsigned char and is not equal to 登录查看完整内容
