如何将字符串中的值相加并转到下一个字母？

function addAndShiftString(str) {
  let sum = 0;
  for (let i = 0; i < str.length; i++) {
    sum += str.charCodeAt(i);
  }
  
  let remainder = sum % 26;
  let result = String.fromCharCode(remainder + 65); // 65是字母'A'的ASCII码值
  
  if (remainder === 0) {
    result = 'Z';
  }
  
  return result;
}

const inputString = 'abc';
const output = addAndShiftString(inputString);
console.log(output); // 输出'D'