小编vny*_*lng的帖子

我有以下代码:

qstn:
  cout << "Input customer's lastname: ";
  getline(cin, lname);

  if (lname.find_first_not_of("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ ") != string::npos) {
      cout << "You can only input alpha here!\n";
      cin.clear();
      goto qstn;
  } else if (lname.empty()) {
      cout << "Please enter your firstname!\n";
      cin.clear();
      goto qstn;
  }

  int lnamel = lname.length();
  int strl = str.length();
  int is = 0;

  for (int i = 1; i < strl;) {
      i++;
      is++;

      if (lname[i] == lname[is] && lname[i] == ' ' || lname[0] == ' ') { …