二、单词转换器（转换译码）
代码有点丑，输入输出IO库还很需要加强。。。对文件的操作基本是文盲。。
#include <map>
#include <vector>
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
// 2013.11.18 Written by C_SuooL_Hu
using namespace std;
ifstream& open_file(ifstream&, const string&);
int main()
{
freopen("out.txt", "w", stdout);
// map to hold the word transformation pairs:
// key is the word to look for in the input; value is word to use in the output
map<string, string> trans_map;
string key, value;
// ´´½¨Á÷
ifstream myfile ("trans_map.txt");
ifstream myfilein ("in.txt");
ofstream outfile("out.txt");
// ÅжÏÎļþÊÇ·ñ´ò¿ª
if(!myfile)
{
cout << "Unable to open myfile";
exit(1); // terminate with error
}
if(!outfile)
{
cout << "Unable to open outfile";
exit(1); // terminate with error
}
// read the transformation map and build the map
while (myfile >> key >> value)
{
trans_map.insert(make_pair(key, value));
}
// this block just produces the vector so that we can print it
// for the book
cout << "Here is our transform string input:\n\n";
// read some text to transform
string word;
// ok, now we're ready to do the transformations
// open the input file and check that the open succeeded
string WORD;
bool firstword = true; // controls whether a space is printed
while (myfilein >> WORD)
{
// ok: the actual mapwork, this part is the heart of the program
map<string, string>::const_iterator map_it =
trans_map.find(WORD);
// if this word is in the transformation map
if (map_it != trans_map.end())
{
// replace it by the transformation value in the map
WORD = map_it->second;
}
if (firstword)
firstword = false;
else
cout << " "; // print space between words
cout << WORD;
}
cout << endl; // done with this line of input
return 0;
}
测试结果：
