146 lines
3.8 KiB
C++
146 lines
3.8 KiB
C++
#include <map>
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#include <iostream>
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#include <string>
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#include <vector>
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#include "split.h"
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using std::cin; using std::cout;
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using std::endl; using std::getline;
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using std::istream; using std::string;
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using std::vector; using std::map;
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// find all the lines that refer to each word in the input
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map<string, vector<int> >
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xref(istream& in,
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vector<string> find_words(const string&) = split)
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{
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string line;
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int line_number = 0;
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map<string, vector<int> > ret;
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// read the next line
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while (getline(in, line)) {
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++line_number;
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// break the input line into words
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vector<string> words = find_words(line);
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// remember that each word occurs on the current line
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#ifdef _MSC_VER
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for (std::vector<string>::const_iterator it = words.begin();
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#else
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for (vector<string>::const_iterator it = words.begin();
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#endif
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it != words.end(); ++it)
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ret[*it].push_back(line_number);
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}
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return ret;
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}
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int main()
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{
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// call `xref' using `split' by default
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map<string, vector<int> > ret = xref(cin);
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// write the results
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#ifdef _MSC_VER
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for (std::map<string, vector<int> >::const_iterator it = ret.begin();
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#else
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for (map<string, vector<int> >::const_iterator it = ret.begin();
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#endif
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it != ret.end(); ++it) {
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// write the word
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cout << it->first << " occurs on line(s): ";
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// followed by one or more line numbers
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#ifdef _MSC_VER
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std::vector<int>::const_iterator line_it = it->second.begin();
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#else
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vector<int>::const_iterator line_it = it->second.begin();
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#endif
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cout << *line_it; // write the first line number
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++line_it;
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// write the rest of the line numbers, if any
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while (line_it != it->second.end()) {
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cout << ", " << *line_it;
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++line_it;
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}
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// write a new line to separate each word from the next
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cout << endl;
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}
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return 0;
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}
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#include <map> // 引入 map 容器，用于存储每个单词及其出现的行号
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#include <iostream> // 引入标准输入输出流库
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#include <string> // 引入字符串库
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#include <vector> // 引入动态数组库，用于存储每一行的单词
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#include "split.h" // 引入自定义的 split.h 库，假设包含用于分割字符串的函数
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using std::cin; // 使用标准输入流
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using std::cout; // 使用标准输出流
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using std::endl; // 使用换行符
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using std::getline; // 使用getline函数读取整行输入
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using std::istream; // 使用输入流
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using std::string; // 使用字符串类型
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using std::vector; // 使用vector容器
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using std::map; // 使用map容器
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// xref函数：用来查找每个单词在文本中出现的行号
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// 参数：输入流 in 和一个函数指针 find_words，用于分割每行的单词（默认为 split 函数）
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map<string, vector<int> >
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xref(istream& in,
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vector<string> find_words(const string&) = split)
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{
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string line; // 用来存储每一行的文本
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int line_number = 0; // 行号
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map<string, vector<int> > ret; // 用map来存储每个单词及其对应的行号
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// 按行读取输入
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while (getline(in, line)) {
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++line_number; // 增加行号
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// 调用find_words函数将一行文本分割成单词
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vector<string> words = find_words(line);
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// 将当前行号添加到每个单词的对应位置
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for (vector<string>::const_iterator it = words.begin(); it != words.end(); ++it)
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ret[*it].push_back(line_number); // 将单词和行号对应起来
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}
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return ret; // 返回包含每个单词及其行号的map
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}
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int main()
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{
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// 调用 xref 函数，默认使用 split 来分割单词
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map<string, vector<int> > ret = xref(cin);
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// 输出结果
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for (map<string, vector<int> >::const_iterator it = ret.begin(); it != ret.end(); ++it) {
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// 输出单词
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cout << it->first << " occurs on line(s): ";
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// 获取并输出单词出现的行号
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vector<int>::const_iterator line_it = it->second.begin();
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cout << *line_it; // 输出第一个行号
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++line_it;
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// 输出其余的行号
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while (line_it != it->second.end()) {
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cout << ", " << *line_it;
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++line_it;
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}
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// 换行
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cout << endl;
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}
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return 0; // 程序结束
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}
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