Question

C++

HTML files use tags enclosed in angle brackets to denote formatting instructions. For ex- ample, indicates bold, indicates italics, etc. If a web browser is displaying an HTML document that contains ‘<’ or ‘>’ then it may mistake these symbols for tags. This is a common problem with C++ files, which contain many <’s and >’s. For example, the line “#include ” may result in the browser interpreting as a tag. To avoid this problem, HTML uses special symbols to denote ‘<’ and ‘>’. The < symbol is created with the string “<” while the ‘>’ symbol is created with the string “>” . Write a program that reads in a C++ source file and converts all ‘<’ symbols to “<” and all ‘>’ symbols to “>” . Also add the tag

 to the beginning of the file and 

to the end of the file. This tag preserves whitespace and formatting in the HTML document. Your program should create a new file with the converted output. To implement this, you should write a function ‘convert’ that takes the input and output streams as parameters. As an example, given the following input file: #include 1 int main() { int x=4; if (x < 3) x++; cout << x << endl; } The program should produce a textfile with the following contents:

        #include 
        int main() {
              int x=4;
              if (x < 3) x++;
              cout << x << endl;
} 

You can test your program with any .cpp file you have as input (Make sure to make a copy of the input file as you may loose it with incorrect File I/O). You should test your output file by opening it with a web browser. The contents should appear identical to the original source code.

Answer 1

#include <iostream>
#include <fstream>
#include <cstring>
#include <string>
#include <cstdlib>
using namespace std;

function void convert(ifstream inStream, ofstream outStream){
   // Input file to convert
string dataFile;
// Output file with .html on the end
string outputFileName;
char eachChar;
int i;

cout << "Enter file name: " << endl;
cin >> dataFile;

// Opening the file given by user
inStream.open(dataFile.c_str());
if (inStream.fail()) {
cout << "error in opening file." << endl;
exit(1);
}

   // preparing the output result file
   outputFileName = dataFile + ".html";
   outStream.open(outputFileName.c_str());

   // outputting <pre> tag
   outStream << "<PRE>" << endl;

   // reading file line by line
   while (!inStream.eof()) {
           inStream.get(eachChar); // reading each character
           // replacing '>' and '<' symbol
       if (eachChar == '<') {
           outStream << "<";
       }
       else if (eachChar=='>') {
           outStream << ">";
       }
       else outStream << eachChar;
   }
   // finally outputting</pre> tag
   outStream << "</PRE>" << endl;
   inStream.close();
   outStream.close();
   cout << "Processing done... Check output file " << outputFileName << endl;
}
// mail
int main() {
ifstream inStream;
ofstream outStream;
   convert(inStream, outStream);
}