C++ :: How To Find And Replace Info In Text File

I have a program that gives the user the option to create an employee ID, name, address and so on. It also has the option to search employee by employee ID.

What I want to know is how to add and replace employee info. For example employee changes address. Also how to delete employee information from text file.

Here's my code:

//This program uses file input and output for an employee information system.
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
int main(){
ifstream inFile; //declare ifstream as inFile and ofstream as outFile
ofstream outFile;

[Code] ....