Question

Task:

• if the character read in is a '.' (dot), ',' (comma), '?' (question mark), '-' (dash), or a "'" (single quote), then it is replaced by a ' ' (space) character unless these characters appear inside a double quotation-mark enclosed substring; and,
• if the character is not a '.' (dot), '.' (comma), '?' (question mark), '-' (dash), or a "'" (single quote), then it is always output as-is.

You program must process all input from standard input (i.e., std::cin) and write all output to standard output (i.e., std::cout). This must be done in C++.

Edit: You can consider the input as a string

Clarifications:

• In this assignment, do not use 's ispunct() or the ispunct() found within the C++ Standard Library. Simply hard-code the checks for punctuation in your code, e.g., use a switch statement and case labels on byte.
• If a opening double-quotation character is not closed, then output everything to the screen (to the end-of-file/error condition), i.e., don't worry that the quotation mark not being closed.
• Do not convert double-quotation characters to whitespace.
• If you don't know where to start, start with the following code:

#include 
#include  // for std::noskipws

using namespace std;

int main()
{ 
  bool is_within_double_quotes = false;
  char byte; 
  while (cin >> noskipws >> byte)
  { 
    // NOTE: output your bytes with cout.put(byte);
    //       or, cout << byte; (if byte is a char)
    //       or, cout << static_cast(byte); (if byte is not a char)
    #error "Write code in here to process the input and write output to std::cout."
  }
}

Sample Program Input File:

Consider this input file a1-input.dat:

$ cat a1-input.dat
This -is' ?some? text.
"This i-s 'so'.me text?"
"a.b-c'd?z"A.B-C'D?Z'0.1-2"3?9'4.5-6'7?"aA.bB-cC'dD?zZ
$

Sample Program Run:

This is a sample program run:

$ ./a.out 

Answer 1

--------------------------------------main.cpp-------------------------------

#include <iostream>
#include <iomanip>       // header for noskipws
#include <fstream>       // for reading files
using namespace std;
int main()
{
   char result;
   ifstream fin("a1-input.dat");
   bool is_within_double_quotes = false;
   char byte;
   while (fin >> noskipws >> byte)
   {
       // check if current character is double quote
       if(byte == '"')      
       {
           // toggle the flag to indicate text between double quotes
           is_within_double_quotes = !is_within_double_quotes;      
       }
       // if current character is not inside double quotes, process it
       if (!is_within_double_quotes)      
       {
           switch (byte)
           {
           case '.':
           case '?':
           case ',':
           case '\'':
           case '-':
               result = ' ';
               break;
           default:
               result = byte;
               break;
           }
       }
       // else print the character as is
       else      
       {
           result = byte;
       }
       cout << result;
   }
  
}

----------------------------------------output-----------------------------------------