将Char转换为Int

char = '1'
int_value = int(char)

char c = '1';
int intValue = Character.getNumericValue(c);

char c = '1';
int intValue = (int)char.GetNumericValue(c);

let char = '1';
let intValue = parseInt(char);

char c = '1';
int intValue = c - '0';