C++ program to count frequency of words of any file
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <map>
#include <iomanip>
using namespace std;
bool buildMap();
void writeIndex();
void AddWordtoMap(std::string);
map wordMap;
int main(int argc, char** argv) {
if (buildMap()){
cout<<"\n The map has "<< wordMap.size() << " elements";
writeIndex();
}
return 0;
}
bool buildMap(){
string filename;
cout<<"\n Enter file name : ";
cin>>filename;
ifstream inputFile(filename.c_str());
string line;
if(inputFile.is_open()){
cout<<"\n\n File opened Successfully...\n\n";
while(getline(inputFile, line)){
std::size_t prev =0, pos;
while((pos = line.find_first_of
("~`=!@#$%^&*)/\?-_|[,. }] (_-+{;':"">prev){
AddWordtoMap(line.substr(prev, pos-prev));
}
prev= pos+1;
}
if(prev< line.length()){
AddWordtoMap(line.substr(prev, std::string::npos));
}
}
inputFile.close();
}
else
{
cout<<"\n-Unable to open file-\n"<<endl;
return false;
}
return true;
}
void AddWordtoMap(std:: string str){
map ::iterator it = wordMap.find(str);
if(it!=wordMap.end()){
it->second = it->second + 1;
}
else{
wordMap.insert(std::make_pair(str, 1));
}
}
void writeIndex(){
for(map ::iterator itr = wordMap.begin();
itr!=wordMap.end(); ++itr){
std::cout<<"\n "<< setw(30) <<itr->first<< setw(10)<<itr->second;
}
}
Execution on Word Indexing
