(in C++ ) I have to write a program that does the following: Write a program tha

Question

(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 = ' ';
   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 << " ";
       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!

Explanation / Answer

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 = ' ';
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;
}

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.