C ++程序在文件中打印唯一单词
文件是存储字流的存储位置。在一个文件中，有各种各样的单词。在此程序中，我们将从文件中找到所有唯一的单词并进行打印。
一个独特的词的意思的词出现的次数是一个在文件中。
例如，
nhooo.com is best for programming tutorials.
这里，教程一词不止出现一次，因此不是唯一的。其余所有单词都是唯一的。
算法
To check for unique words in the given file. Using iterator with two variables : data and occurence. Input : File Step 1 : Read each line from the file and follow step 2 Step 2 : check for the occurence of the word in the data structure using interator.data. Step 2.1 : if data matches increase the occurrence by one corresponding to the data. Step 2.2 : if data does not match add new value and set its occurence to one. Step 3: Iterate over the date structure. And check for occurence value of each value. Step 3.1 : If the occerence is equals to 1 then prints the data corresponding it else do nothing.
示例
#include <bits/stdc++.h>
using namespace std;
int main(){
char filename[] = "test.txt";
ofstream fs("test.txt", ios::trunc);
fs << "nhooo.com is best for programming tutorials";
fs.close();
fstream fs("test.txt");
map<string, int> mp;
string word;
while (fs >> word){
if (!mp.count(word))
mp.insert(make_pair(word, 1));
else
mp[word]++;
}
fs.close();
for (map<string, int> :: iterator p = mp.begin();
p != mp.end(); p++){
if (p->second == 1)
cout << p->first << endl;
}
return 0;
}输出结果
best for is point Programming