Find&Replace String!

[stealwings]

Hello everyone;
Its me again, I was wondering if some one can give me some guidelines about how to Find and replace a string after reading it from a file using i/o commands I mean, I have a file that I opened and read the context of it with the ftream functions shown as below:

#include "stdafx.h"
#include <iostream>
using namespace std;
#include <fstream>
using std::ifstream;
using std::ofstream;
#include <stdio.h>
#include <cstdlib>
#include <string>
#include <stdlib.h>
#include <iomanip>
#define MAXLENGTH 256
int _tmain(int argc, _TCHAR* argv[])
{
    char MyWord[MAXLENGTH];
    char *MyString;
    ifstream ReadWord;
    ofstream WriteWord;
    ReadWord.open("file.txt");
    WriteWord.open("file.dat");
    if(!WriteWord)
    {
        cerr<<"couldn't create file"<<endl;
        exit(1);
    }
    if (!ReadWord)
    {
        cerr<<"not found"<<endl;
        exit (1);
    }
 
    while(!ReadWord.eof())
    {
        ReadWord.getline(MyWord,MAXLENGTH);
    //    ReadWord>>MyWord;
        MyString=MyWord;
        cout<<MyString<<endl;
    //    WriteWord<<MyString<<endl;    
    }
    ReadWord.close();
    WriteWord.close();
    return 0;
}
 
 

now I want to know how can I find a word or a phrase then replace it with another, I have tried the .fin() function but the compiler tells me that the function must have class/strut/union type, and I don't really know how to do that, my knowledge is really poor in coding, plz some one help me out. Thanks in advance.

[horace1]

as you are using C++ read the information into a string (not a char array) and use the string search and replace functions, see
http://www.cprogramming.com/tutorial/string.html

[stealwings]

as you are using C++ read the information into a string (not a char array) and use the string search and replace functions, see
http://www.cprogramming.com/tutorial/string.html

I don't get you, can you be a little bit more specific plz? Thx.