Question

c++ please and please put explanation ! Write a function that determines if there are three of the same line in a row in a file. The function returns a bool and is passed a string which contains the filename.

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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// dataTxt.txt

Hello this is rahul
Hello this is rahul
Hello am sachin
Hello Mahi
Hello this is rahul
Hello am sachin
Hello am sachin
Hello am sachin
Hello Mahi

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#include <fstream>
#include <iostream>
#include <iomanip>
using namespace std;

bool readFile(string filename);
int main() {
  

  
  

   bool b=readFile("dataTxt.txt");
   if(b)
   {
       cout<<"There is three consecutive same lines"<<endl;
   }
   else
   {
       cout<<"There is no three consecutive same lines"<<endl;
   }

  
  
return 0;
}
bool readFile(string filename)
{
   //defines an input stream for the data file  
ifstream dataIn;
  
   //Opening the input file
dataIn.open(filename.c_str());
//checking whether the file name is valid or not
if(dataIn.fail())
{
   cout<<"** File Not Found **";
   exit(0);
}
else
{
   string line;
   int cnt=0;
   while(getline(dataIn,line))
   {
       cnt++;
   }
   dataIn.close();
  
   // Creating array dynamically
string* lines = new string[cnt];
  
//Opening the input file
dataIn.open(filename.c_str());
for(int i=0;i<cnt;i++)
{
   getline(dataIn,line);
   lines[i]=line;
   }
   dataIn.close();
   for(int i=0;i<cnt-2;i++)
   {
       if(lines[i].compare(lines[i+1])==0 && lines[i+1].compare(lines[i+2])==0)
       return true;
   }
  
}
return false;
}

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Output: (Console)

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