Question

C++, program that use the built in string class, its constructors, some of its methods and operators. It reads an input file of English text, one word at a time. The file should consist of about 500 words. Keep only the words, removing any punctuation or other characters. .Store the words in a built-in STL container, such as vector or map.,Choose a list of about 10 words, for example, {she,, and, he, or, the}., Remove these words from the list.,, Next count the number of occurrences of the 3 most frequent words. • Implement the code with optimized algorithms.

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
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// aboutComputer.txt (Input file)

A computer is a device that can be instructed to carry out an
arbitrary set of arithmetic or logical operations automatically.
The ability of computers to follow a sequence of operations
called a program make CAT computers very flexible and useful.
Since ancient times simple CAT manual devices like the abacus
aided people in doing calculations. Early in the Industrial
Revolution, some mechanical devices were built to automate
long tedious tasks, such as guiding patterns for looms.

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#include <iostream>
#include <map>
#include <string>
#include <cctype>
#include <fstream>
#include <iomanip>

using namespace std;
void addWord(map<std::string,int> &words,string s);
void readFile(string infile,map<std::string,int> &words);
void display(map<std::string,int> words);
  
int main() {
// Declaring variables
std::map<std::string,int> words;
  
  
//defines an input stream for the data file
ifstream dataIn;

  
string infile;
cout<<"Please enter a File Name :";
cin>>infile;
readFile(infile,words);
  
display(words);

  
return 0;
}
void readFile(string infile,map<std::string,int> &words)
{
string s;
//defines an input stream for the data file
ifstream dataIn;
//Opening the input file
dataIn.open(infile.c_str());
//checking whether the file name is valid or not
if(dataIn.fail())
{
cout<<"'"<<infile<<"' File Not Found **";
exit(0);
}
else
{
//counting how many words in the file
while(dataIn>>s)
{
addWord(words,s);
}
dataIn.close();
}
}
void addWord(map<std::string,int> &words,string s)
{
char c;
string str="";
for(unsigned int i=0;i<s.length();i++)
{
c=s[i];
if(isalpha(c))
str.push_back(std::toupper(c));
}
++words[str];
}
void display(map<std::string,int> words)
{

cout<<"---------------------"<<endl;
cout<<"Word Counter Summary "<<endl;
cout<<"---------------------"<<endl;
cout<<"\nWord\t\tCount"<<endl;
cout<<"------\t\t-----"<<endl;
  
for(std::map<std::string,int>::iterator iter = words.begin(); iter!=words.end(); ++iter)
{
cout<<setw(16)<<left<<iter->first<<setw(5)<<right<<iter->second<<std::endl;
}
  
}

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Output:

C:\Program Files (x86)\Dev-Cpp\MinGW64\bin\ReadFileWordFrequencyMap.exe Please enter a File Name :aboutComputer.txt Word Counter Summary Word Count 4 1 1 1 1 1 1 1 А ABACUS ABILITY AIDED AN ANCIENT AND ARBITRARY ARITHMETIC AS AUTOMATE AUTOMATICALLY BE BUILT CALCULATIONS CALLED CAN CARRY CAT COMPUTER COMPUTERS DEVICE DEVICES DOING EARLY FLEXIBLE FOLLOW FOR GUIDING IN INDUSTRIAL INSTRUCTED IS LIKE LOGICAL LONG LOOMS MAKE MANUAL MECHANICAL OF OPERATIONS OR 1 1 1 1 1 1 1 1 1 1 2 1 2 1 2 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 3 2 1

OUT PATTERNS PEOPLE PROGRAM REVOLUTION SEQUENCE SET SIMPLE SINCE SOME SUCH TASKS TEDIOUS THAT THE TIMES TO USEFUL VERY WERE 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 3 1 1 1 Process exited after 5.954 seconds with return value 0 Press any key to continue

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