in C I have to write a program that does the following Write

(in C++)

I have to write a program that does the following:

Write a program that reads a file containing only integers, but some of the integers have embedded commas (as in 145, 020). The program should copy the information to a new file, removing any commas from the information. Do not change the number of values per line in the file.

so far i have this:

#include
#include

using namespace std;

int main()
{
   const char NEWLINE = \'\ \';
   const char TAB = \'\\t\';
   const char COMMA = \',\';
   char input_char = 1;
   ifstream infile(\"d:\\\\withcommas.txt\");
   if (infile.fail())
   {
       cerr << \"error opening withcommas.txt\ \";
       exit(-1);
   }
   ofstream output;
   output.open(\"d:\\\\withoutcommas.txt\");
   if (output.fail())
   {
       cerr << \"error opening withoutcommas.txt\ \";
       exit(-1);
   }
   while (!infile.eof())
   {
       if (input_char == COMMA)
           output << \"\\t\";
       else
       {
           int x;
           infile >> x;
           output << x << endl;
       }
   }
   infile.close();
   output.close();
   return 0;
}

but every time I run the program my output file just returns nonsense and doesn\'t do what I want it to, I have a feeling it has something to do with my While loop. If you could please tell me exactly what I need to add to this and why to make it run correctly I would greatly appreciate it thank you!

Solution

Opening file logic is wrong in your code, apart from this; remaining syntax is fine. Here I am attaching working and modified code.

-----------------------------------------------------------------------------------------------------------------------------------------------------------------

#include <iostream>
#include<stdlib.h>
#include <fstream>
#include <string>
using namespace std;

int main()
{
const char NEWLINE = \'\ \';
const char TAB = \'\\t\';
const char COMMA = \',\';
char input_char = 1;
string line;
ifstream infile(\"withcommas.txt\");
if (infile.fail())
{
cerr << \"error opening withcommas.txt\ \";
exit(-1);
}
ofstream output(\"withoutcommas.txt\");
if (output.fail())
{
cerr << \"error opening withoutcommas.txt\ \";
exit(-1);
}
while (getline( infile, line )){
for(int i=0;i<line.length();i++){
       if(line[i] != \',\'){ //filtering comma
           output<<line[i];
       }
   }
   output<<\"\ \";
}
infile.close();
output.close();
return 0;
}