Write a C++ program that reads in a text file (data.txt), and prints to the scre

Question

Write a C++ program that reads in a text file (data.txt), and prints to the screen the text with all extra blanks removed (if there are 2 or more blanks in a row, replace them by a single blank) and changes all LOWERCASE letters to UPPERCASE letters. WATCH THAT YOU DON”T DELETE CARRIAGE RETURNS and tabs – whitespace includes tabs and carriage returns as well as blanks…so you only want to get rid of extra blank characters.

****input Text:

In    the    late 60s and      early 70s,       PL/I  was       popular, and    was the largest language of its day. The C language was       developed       as a       reaction, where     the language itself is     relatively small, and instead of the hundreds of "built-in" functions of           PL/I,        it      allowed        the user to      choose the subset of functions they wanted to use via #include statements.

Later, C++ was        developed as an        extension to C, creating a        language       that was still procedure-oriented via its functions., but with object                constructions                  overlaid on it.  As C++ continued to develop, more                     constructions                   were added ( e.g. templates),                  and existing                   features were redefined .

Explanation / Answer

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#include <iostream>
#include <fstream>
using namespace std;
   int main()
   {char filename[30];
   string input;
   ifstream in;
    int i;
    char prev;
    cout<<"what is the name of the file you are using? ";
   cin>>filename;
   in.open(filename);           //open file
   if(in.fail())             //is it ok?
       { cout<<"file did not open please check it ";
        system("pause");
        return 1;
        }
   cout<<endl;
   getline(in,input);
   while(in)
      {i=0;
       prev=input[i];
      if(islower(input[i]))
            cout<<(char)toupper(input[i]);
      else
           cout<<input[i];
       for(i=1;input[i]!='';i++)
           {if(input[i]!=' ')
                {if(islower(input[i]))
                         cout<<(char)toupper(input[i]);
                   else
                        cout<<input[i];
                   }
            else
                if(prev!=' ')
                    cout<<input[i];
               prev=input[i];
               }
        cout<<endl;
        getline(in,input);
        }
       
         system("pause");
         return 0;
     }

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