Can't Find Error, PLS CHECK URGENT!!!

Suzanne (56)
This is a program I created which reads data grom the Yahoo Finance page but despite the program being able to compile, when I execute, it doesn't read my HTML file, I dunno why.Pls suggest the error.Compiler shows none.

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#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
#include <cstdlib>

using namespace std;

class IndexDetails{
      public:
             IndexDetails();
             void MatchPattern();
             void Parser();
             void getValue();
             
      private:
              string line;
              string value;
              string diff;
                  };
                  
IndexDetails::IndexDetails()
{
   line = " ";
   value = " ";
   diff = " ";
}
void IndexDetails::Parser()
{
   int k = 0;   
   while(k < line.length())
   {
     if((line[k] == '<')||(line[k] == '>')||(line[k] == '/'))
      {
        line[k] = ' ';
      }
        k++;
   }
}
          
void IndexDetails::MatchPattern()
{
int num; int ptr = 0;
num = line.length();
while(ptr<num)
{
if(0 == strcmp("Dow",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("Nasdaq",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("S&P 500",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("FTSE 100",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("DAX",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("Nikkei 225",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("Hang Seng", line.c_str()))
{
    getValue();
}
else if(0 == strcmp("Straits Times Index", line.c_str()))
{
    getValue();
}
else 
{
cout << "None " << endl;
}
system("pause");
}
}

void IndexDetails::getValue()
{
     string check("id"); size_t found; int y= 0; int digi;
     
      while(y < line.length())
      {
            found = line.find(check);
            if(found != string::npos)
            {
                 digi = int(found);
                 if(isdigit(line[y]))
                 {
                   value = line[y] + value;
                 }    
            }                      
     
      }
}         

int main()
{
       
	ifstream inFile;
    inFile.open("finance.htm");

    IndexDetails temp;

if(!inFile)
{
cout << "The file does not exist. " << endl;

return 1;
}
else
{
  string alpha;
  
  getline(inFile,alpha);
  temp.MatchPattern();
}
inFile.close();
system("pause");

return 0;
}
Last edited on
pyschoder (62)
num = line.length();

where in length of line is 0

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IndexDetails::IndexDetails()
{
   line = " ";
   value = " ";
   diff = " ";
}
Suzanne (56)
Actually, I think I realise a mistake I made. I wanted to read line by line but line is declared as a private variable in my class. Now, for getline when I pass the variable line, the compiler doesn't compile so I had to create another string variable alpha. Bcose of this, I realise now line contains nth so then its meaningless.

The code should actually be like this:
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#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
#include <cstdlib>

using namespace std;

class IndexDetails{
      public:
             IndexDetails();
             void MatchPattern();
             void Parser();
             void getValue();
             
      private:
              string line;
              string value;
              string diff;
                  };
                  
IndexDetails::IndexDetails()
{
   line = " ";
   value = " ";
   diff = " ";
}
void IndexDetails::Parser()
{
   int k = 0;   
   while(k < line.length())
   {
     if((line[k] == '<')||(line[k] == '>')||(line[k] == '/'))
      {
        line[k] = ' ';
      }
        k++;
   }
}
          
void IndexDetails::MatchPattern()
{
int num; int ptr = 0;
num = line.length();
while(ptr<num)
{
if(0 == strcmp("Dow",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("Nasdaq",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("S&P 500",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("FTSE 100",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("DAX",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("Nikkei 225",line.c_str()))
{
    getValue();
}
else if(0 == strcmp("Hang Seng", line.c_str()))
{
    getValue();
}
else if(0 == strcmp("Straits Times Index", line.c_str()))
{
    getValue();
}
else 
{
cout << "None " << endl;
}
system("pause");
}
}

void IndexDetails::getValue()
{
     string check("id"); size_t found; int y= 0; int digi;
     
      while(y < line.length())
      {
            found = line.find(check);
            if(found != string::npos)
            {
                 digi = int(found);
                 if(isdigit(line[y]))
                 {
                   value = line[y] + value;
                 }    
            }                      
     
      }
}         

int main()
{
       
	ifstream inFile;
    inFile.open("finance.htm");

    IndexDetails temp;

if(!inFile)
{
cout << "The file does not exist. " << endl;

return 1;
}
else
{
  
  getline(inFile,line);
  temp.MatchPattern();
}
inFile.close();
system("pause");

return 0;
}


But this doesn't compile.
pyschoder (62)
line in main was not declared..

create a member function that set the value of line in your class then
pass each line to that function prior to call MatchPattern
Suzanne (56)
line has been declared as a private string variable in my class. I created a function to set the value but nothing works. Could someone suggest some other way to change things?
Last edited on
NGen (689)
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void IndexDetails::Parser()
{
   int k = 0;   
   while(k < line.length())
   {
     if((line[k] == '<')||(line[k] == '>')||(line[k] == '/'))
      {
        line[k] = ' ';
      }
        k++;
   }
}

HTML works using elements and a node tree. As far as I can see, you're not preserving this. It's impossible to tell an element from text using the method you're trying.
Suzanne (56)
Now I m able to read my HTML file but correct results are not being produced, can someone help run my program for me?Its very important & urgent that my program work. I would be really grateful if someone helped me identify & provide the correct results for my program.It compiles but results r wrong.

Main Program:
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#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
#include <cstdlib>

#include "indexDetails.h"

using namespace std;

int main(int argc, char *argv[])
{
     IndexDetails temp;
     temp.readFile();
    



system("PAUSE");
    return EXIT_SUCCESS;
}


Header File:
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#ifndef INDEXDETAILS_H
#define INDEXDETAILS_H


#include <iostream>
#include <fstream>
#include <string>
#include <stdlib.h>
#include "indexDetails.h"

using namespace std;

class IndexDetails{
      public:
             IndexDetails();
             void readFile();
             void MatchPattern();
             void Parser();
             void getValue();
             
      private:
              string line;
              string value;
              string diff;
                  };
#endif


cpp FILE:

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#include <iostream>
#include <fstream>
#include <string>
#include <stdlib.h>
#include "indexDetails.h"

using namespace std;

IndexDetails::IndexDetails()
{
   value = " ";
   diff = " ";
}
                     
void IndexDetails::Parser()
{
   int k = 0;   
   while(k < line.length())
   {
     if((line[k] == '<')||(line[k] == '>')||(line[k] == '/'))
      {
        line[k] = ' ';
      }
        k++;
   }
   MatchPattern();
}
          
void IndexDetails::MatchPattern()
{
int num; int ptr = 0;
num = line.length();
while(ptr<num)
{
if(0 == strcmp("Dow",line.c_str()))
{
    cout << "Index Name: " << "Dow" << endl; 
    getValue();
}
else if(0 == strcmp("Nasdaq",line.c_str()))
{
    cout << "Index Name: " << "Nasdaq" << endl; 
    getValue();
}
else if(0 == strcmp("S&P 500",line.c_str()))
{
    cout << "Index Name: " << "S&P 500" << endl;  
    getValue();
}
else if(0 == strcmp("FTSE 100",line.c_str()))
{
    cout << "Index Name: " << "FTSE 100" << endl; 
    getValue();
}
else if(0 == strcmp("DAX",line.c_str()))
{
    cout << "Index Name: " << "DAX" << endl;   
    getValue();
}
else if(0 == strcmp("Nikkei 225",line.c_str()))
{
    cout << "Index Name: " << "Nikkei 225" << endl; 
    getValue();
}
else if(0 == strcmp("Hang Seng", line.c_str()))
{
    cout << "Index Name: " << "Hang Seng" << endl;  
    getValue();
}
else if(0 == strcmp("Straits Times Index", line.c_str()))
{
    cout << "Index Name: " << "Straits Times Index" << endl; 
    getValue();
}
else 
{
cout << "None " << endl;
}
system("pause");
}
}

void IndexDetails::getValue()
{
     string check("id"); size_t found; int y= 0; int digi;
     
      while(y < line.length())
      {
            found = line.find(check);
            if(found != string::npos)
            {
                 digi = int(found);
                 if(isdigit(line[y]))
                 {
                   value = line[y] + value;
                 }    
            }                      
     
      }
      cout << "The value is:" << value << endl;
}      

void IndexDetails::readFile()
{
ifstream inFile ("finance.htm");

  if (inFile.is_open())
  {
    while (!inFile.eof() )
    {
        getline(inFile,line);
        Parser();
      
    }
    inFile.close();
  }

  else 
  cout << "Unable to open file";
     
}
Suzanne (56)
finance.htm is a sample HTML Finance Page taken from Yahoo Finance, Singapore. I would be highly grateful to everyone who could test my program & get it working for me. I have been struggling with this for a long while now.
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