C++ program to generate c++ code from text

If it only needs to be able to compile this exact program, then the following will do:

void main()
{
    cout << "ab5=5" << endl;
    cout << "15" << endl;
    cout << "eb=25" << endl;
}

It produces the same output as your source program. Unfortunately, it can't do anything else :-)

You might embed a script language in order to accomplish (something similar to) that, i.e. evaluate user's expressions at runtime.
I suggest Lua[^] , is lightweight, fast and easy to embed in a C/C++ application. Even if you need to exactly interpret your Domain Specific Language, Lua might help you, have a look at the LPeg[^] library.

You text file looks like a kind of pseudo-code. Now you need to convert this pseudo code into C++ code, and you want to write a C++ program to do that, right ? Basically, you will be writing a kind of an interpreter. As Ron Bayer said, it is not as easy as it sounds.

Facebook wrote a software like this which converts PHP code into C++ code to save resources and speed up execution time and the program was a few hundred-thousand lines of code. But don't be encouraged, converting pseudo code (like in your text file) into C++ code probably would be easier than that.

I suggest you to read about Interpreters and writing them, regular expressions and text parsing, data-structures and algorithms...

I do not know the original language. It is a text file. It looks like fortran.
But I need to convert it to c++ code using a c++ program. Content of text file won't be changed.
Please see my code below. Finally I got some hope that I can make it working, Thanks a lot in advance.

<pre><pre lang="xml">#include <iostream>
#include <fstream>
#include <sstream>
#include <Vector>
#include<algorithm>
using namespace std;

/*
Content of my final.txt
Program aba13;
VAR
ab5,cb,be,eb:integer;
BEGIN
ab5=5;
cb=10;
Print("ab5=",ab5);
eb=cb+ab5;
PRINT(eb);
be=2*ab5+eb;
PRINT("be=",be);
END.

// Output should be a c++ file which can be run. Output file name should be aba13.cpp

*/

void readfile(istream &input, vector<vector<string> > &output)
{
   string line;
    while( getline(input, line) )
    {
            istringstream Stream(line);
           vector<string> words;
            string Element;

            while( getline(Stream, Element, ';') )
            {
                    words.push_back(Element);
            }
            output.push_back(words);
    }
}

int main()
{
    ofstream myfile;
    string a;

    string str;


     fstream file("final.txt", ios::in);
    myfile.open ("output.txt"); // this is supposed to be aba13.cpp

    if(!file.is_open())
    {
           cout << "File not found!\n";
            return 1;
    }

    typedef vector< vector<string> > myV;
    myV data;

    readfile(file,data);

    for(myV::iterator i = data.begin(); i != data.end(); ++i)
    {
            for(vector<string>::iterator j = i->begin(); j != i->end(); ++j)
         {
                   a=*j;
                if (find(i->begin(),i->end(), "Program abc13") != i->end()) // I am trying to read each line and replace with proper c++ code using hand here..
                     myfile <<' '<<";";
{

}
                 /*  cout << a <<"New Line ";//testing
                 myfile <<a<<";";*/
            }

 }

 system("pause");
 file.close();
 myfile.close();

}