c++primer练习11.33

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//实现你自己版本的单词转换程序#include<iostream>#include<map>#include<sstream>#include<fstream>using namespace std;void my_word_transform(ifstream &map_file,ifstream &input);map<string,string> my_build_map(ifstream &map_file);const string& my_transform(const string &s,const map<string,string> &m);int main(int argc,char *argv[]){ifstream in1(argv[1]),in2(argv[2]);my_word_transform(in1,in2);system("pause");}void my_word_transform(ifstream &map_file,ifstream &input){auto my_map=my_build_map(map_file);string text;//du qu mei hang shu ruwhile(getline(input,text)){istringstream stream(text);string word;bool first_word=true;while(stream>>word){if(first_word)first_word=false;else cout<<' ';cout<<my_transform(word,my_map);}cout<<endl;}}map<string,string> my_build_map(ifstream &map_file){map<string,string> my_map;string key;string value;while(map_file>>key&&getline(map_file,value)){my_map[key]=value.substr(1);}return my_map;}const string& my_transform(const string &s,const map<string,string> &m){auto find=m.find(s);if(find!=m.end())return find->second;elsereturn s;}

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