如何添加字符字母的ascii值？

char = 'A'
ascii_value = ord(char)
new_ascii_value = ascii_value + 3
new_char = chr(new_ascii_value)

print(new_char)  # 输出'D'

var char = 'A';
var asciiValue = char.charCodeAt(0);
var newAsciiValue = asciiValue + 3;
var newChar = String.fromCharCode(newAsciiValue);

console.log(newChar);  // 输出'D'

char ch = 'A';
int asciiValue = (int) ch;
int newAsciiValue = asciiValue + 3;
char newChar = (char) newAsciiValue;

System.out.println(newChar);  // 输出'D'

char ch = 'A';
int asciiValue = static_cast<int>(ch);
int newAsciiValue = asciiValue + 3;
char newChar = static_cast<char>(newAsciiValue);

cout << newChar << endl;  // 输出'D'