#include <iostream>

#include <string>

using namespace std;

struct Word

{ string Str;

int Count;

};

void CalcCount(Word *words,string &newWord,int size)

{ int m=0;

for(;m<size;m++)

{ if(words[m].Str==newWord)

{ words[m].Count++;

return;

}

else if(words[m].Str=="")

break;

}

words[m].Str=newWord;

words[m].Count =1;

}

int main()

{

Word *words;

string content;

cout<<"输入一串英文:";

getline(cin, content);

int wCount = 1;

for(unsigned int m=0; m<content.length();m++)

{

if(content[m]==' ')

wCount++;

}

words=new Word[wCount];

string::size_type offset=content.find(' ');

while(offset!=string::npos)

{

string wStr=content.substr(0,offset);

if (wStr.length()<4)

{

wCount--;

content.erase(0,offset+1);

offset=content.find(' ');

continue;

}

content.erase(0,offset+1);

CalcCount(words,wStr,wCount);

offset=content.find(' ');

}

if (content.length()>= 4)

{

CalcCount(words, content, wCount);

}

else wCount--;

for (int n=0; n<wCount; n++)

{

if (words[n].Str=="")

{

wCount--;

}

}

for(m=0;m<wCount-1;m++)

{

cout << words[m].Str << "频率:" << words[m].Count << "次" << endl;

}

delete [] words;

return 0;

}