字符调整

字符调整

/** 大小写转换、获取字母序

• 2024-03-16: https://qoj.ac/submission/355156
  **/
  void rev(std::string &s) {
  int l = s.size();
  for (int i = 1; i < l; i += 2) {
  if (std::isupper(s[i])) {
  s[i] = std::tolower(s[i]);
  } else {
  s[i] = std::toupper(s[i]);
  }
  }
  }

int get(char c) {
int x;
if (std::islower(c)) {
x = c - 'a';
} else {
x = 26 + c - 'A';
}
return x;
}