添加对输入单词包含非字母字符的检查代码#include <iostream> #include <fstream> #include <string> #include <vector> #include <algorithm> #include <iterator> using namespace std; typedef istream_iterator<string> string_input; void welcome() { cout << "******************* 变位词查找系统*********************\n" << "在词典中找出给定的字符串的所有变位词" << endl; } void readDict(vector<string> & dictionary) { cout << "首先，请输入词典的文件名称：" << endl; string dictionary_name; cin >> dictionary_name; ifstream ifs(dictionary_name.c_str()); if (!ifs.is_open()) { cerr << "异常：文件"<< dictionary_name << "没有找到 " << endl; exit(1); } cout << "词典读入中 ..." << flush; copy(string_input(ifs), string_input(), back_inserter(dictionary)); sort(dictionary.begin(),dictionary.end()); cout << "词典包含有 " << dictionary.size() << " 个单词\n\n"; ifs.close(); } void analyseAnagram(const vector<string> & dictionary) { cout << "请输入单词（或任意字母序列）" << endl; for (string_input p(cin); p != string_input(); ++p) { cout << "查找输入单词的变位词中..." << endl; string word = *p; sort(word.begin(), word.end()); bool found_one = false; do { if (binary_search(dictionary.begin(), dictionary.end(), word)) { cout << " " << word ; found_one = true; } } while (next_permutation(word.begin(), word.end())); if (!found_one) cout << " 抱歉，没有找到变位词\n"; cout << "\n请输入下一个单词 " << "(或输入Ctrl+Z终止程序 ) \n" << endl; } } int main() { welcome(); vector<string> dictionary; readDict(dictionary); analyseAnagram(dictionary); system("pause"); return 0; }

为了添加对输入单词包含非字母字符的检查，我们可以在 `analyseAnagram` 函数中在读入单词后进行检查，如果包含非字母字符，则提示用户重新输入单词。修改后的 `analyseAnagram` 函数如下：

void analyseAnagram(const vector<string> & dictionary) {
    cout << "请输入单词（或任意字母序列）" << endl;
    for (string_input p(cin); p != string_input(); ++p) {
        string word = *p;
        // 检查单词是否包含非字母字符
        if (find_if(word.begin(), word.end(), [](unsigned char c) { return !isalpha(c); }) != word.end()) {
            cout << "错误：输入单词包含非字母字符，请重新输入\n" << endl;
            continue;
        }
        cout << "查找输入单词的变位词中..." << endl;
        sort(word.begin(), word.end());
        bool found_one = false;
        do {
            if (binary_search(dictionary.begin(), dictionary.end(), word)) {
                cout << "  " << word;
                found_one = true;
            }
        } while (next_permutation(word.begin(), word.end()));
        if (!found_one)
            cout << "  抱歉，没有找到变位词\n";
        cout << "\n请输入下一个单词 "
            << "(或输入Ctrl+Z终止程序 ) \n" << endl;
    }
}

修改后，如果输入的单词包含非字母字符，会提示用户重新输入单词。